Fatal error: Call to undefined function add_action() - an untouched problem


Trouble writing custom dummy allocator for vector in C++

Why can templates only be implemented in the header file?


Analytic function is identically zero on open unit disk if $|f(z)|\leq 1-|z|$.

$|f(z)|\le 1-|z|\forall z\in D$, we need to show $f\equiv 0$


Change ternary operation into if-else statement


Why is a polynomial defined the way that it is defined?

Why can't polynomials have negative exponents or division by a variable


null pointer exception to get object json node

What is a NullPointerException, and how do I fix it?


It's worth to upgrade from 18.04 to 18.10?

What's the difference between a Long Term Support Release and a Normal Release?


Lead Conversion Trigger Order of Execution


Select nth row using where condition in oracle database

How to select the nth row in a SQL database table?


Why is my power operator (^) not working?


get GPS location co-ordinates and store in an array

How do I get the current GPS location programmatically in Android?


Notation of iterated composition of functions

Iterated self-composition of arbitrary function


My regular expression matches too much. How can I tell it to match the smallest possible pattern?

My regex is matching too much. How do I make it stop?


Minimizing problem (1-dimensional phase transition)

A problem with the functional $F(\chi) = \int_{\mathbb{R}}(\chi'^2+\chi^2(1-\chi)^2)dx$.


How long can I store a food in the pantry, refrigerator, or freezer?


PDFLATEX : Cover Page Image with No Margin


Pearson correlation of data sets with possibly zero standard deviation?


Desktop not showing well using vncserver on ubuntu 15.10


How do I get a relative path from one path to another in C#

How to get relative path from absolute path


Reference numbers out of order using BibTex

Ignore citations in captions in list of figures when numbering


What is the watching order for Tenchi Muyo?


Difference ways of calling methods within the same class in C#


Convergence in Measure and Limit of an Integral

Showing that $\{f_n \}$ converges to $f$ is equivalent to $\lim_{n\to \infty} \int_X \frac{|f_n(x)-f(x)|}{1+|f_n(x)-f(x)|}d\mu(x)=0$


setLayoutManager NullPointException with RecyclerView

What is a NullPointerException, and how do I fix it?


How many ways are there to arrange 1's and 0's with no two 1's in a row?

How many $N$ digits binary numbers can be formed where $0$ is not repeated


With a firmware password set on a Retina MacBook Pro, what are recovery options?


Passing variable names as arguments in R yields unexpected result

Dynamically select data frame columns using $ and a character value


Please clarify the use of "=>" in MVC Razor syntax?


Getting different results form Tan[x] and Tan @ X


Why isn't the ROC curve naturally plotted in 3D?

Why is the ROC curve two-dimensional instead of three-dimensional?


Why are t-tests rather than z-tests used in linear regression?

Wald test in regression (OLS and GLMs): t- vs. z-distribution


I cant find my Minecraft Screenshots anywhere, i have looked at %appdata%/.minecraft Does anyone else know a way i can view them?


How to tell which device the USB drive is assigned as?


Does room temperature affect rising time for bread dough?

How warm must dough be in order to rise?


Mountain Bike has 26 x 2.125 Tires on, Can I Fit 26 x 1.95?

What is the maximum or minimum tire width I can fit on my bicycle


How to hidden or lock file until task executed fully


Can int property be not written to XML during serialization if it is zero?


I want to change the host name - is it enough to edit the /etc/hosts file?

How do I change the hostname without a restart?


How to recognize binaries installed in `~/bin`?

Bash scripts ran from from gnome/nautilus don't have environment variables


Android-'int android.graphics.Bitmap.getWidth()' on a null object reference

What is a NullPointerException, and how do I fix it?


How to prove the Pythagoras theorem using vectors


Apache mod_rewrite with content moved to different subdomain

Redirect, Change URLs or Redirect HTTP to HTTPS in Apache - Everything You Ever Wanted to Know About mod_rewrite Rules but Were Afraid to Ask


My method readFromFiles can't find the source files


Find the value of $ \sum_{n=1}^{\infty} \frac{n^3}{3^n} $

Solving for $\sum_{n = 1}^{\infty} \frac{n^3}{8^n}$?


A word for "untranslatable" words from other languages

What would you call a word that doesn't exist in or translate well into another language?


Fourier Series and epicycles - How to find the radii and angular velocities from a function's Fourier Series expansion


If I kept a body in a groove on a frictionless circular table, and rotate the table with a constant angular velocity, what will happen to the block?

Is the force which throws a body on a rotating disk outwards centrifugal force?


java.lang.NullPointerException I can't find my error as to why


Does a Faraday cage block outgoing signals?


Is friction really independent of surface area?

Is friction a function of surface area? What is the microscopic workings of friction?


Changing variable assignment to boolean value like in Python, but this time in Java


Why does StackExchange not just ban downvoters that don't comment?


Postgresql how match content like "[\s\S]*?" in regex

How do I match any character across multiple lines in a regular expression?


Change directory of Ubuntu www web server?

Change Apache document root folder to secondary hard drive


Can $\sqrt{n} + \sqrt{m}$ be rational if neither $n,m$ are perfect squares?


Is it true that there is an interesting entry in each row of a matrix with nonzero determinant?

Can the determinant of a matrix can be made $0$?


How can I prove this Euler method has a convergence order of two?

Numerical Approximation of Differential Equations with Midpoint Method


How do I use a  tag in a table that does not wrap?

How to prevent text in a table cell from wrapping


communication between web page script and content script and main.js(Add-on code) script

How can my Add-on SDK content script interact with a website page script?


Integral element in $\mathbb{Q}(\sqrt{2})$ over $\mathbb{Z}$ has form $m+n\sqrt{2}$

Describing integral closure of quadratic number fields


Is the ability to unilaterally close/reopen duplicates for Gold Badge holders SO specific?

Increase close vote weight for gold tag badge holders


Understanding QGIS reference frame issue?

Changing projection of shapefile in QGIS


Installing libraspberrypi-bin on Ubuntu Server 20.04 for Raspberry Pi4

What can I do if a repository/PPA does not have a Release file?


Integer polynomial and division by binomial

Is $f(a)\!=\!0\!=\!f(b)\Rightarrow (x\!-\!a)(x\!-\!b)\mid f(x)\,$ true if $\,a=b?\ $ [Double Factor Theorem]


protection from sql injection with GET parameter


How can I restrict apps from using WiFi?

Restrict an iOS app from using Wi-Fi internet


Accessing the Locale Date format with in program automatically

Display date/time in user's locale format and time offset


Why have the home releases of the recent Star Wars films been in March?

How do they decide Blu-ray/DVD release date?


Could one or more black holes be used to pull something out of another black hole?

Is it possible for one black hole to pull an object out of another black hole?


How do I return the response from an asynchronous call?


How can I make the second instance of my program pass control back to the first instance?

How can I tell if another instance of my program is already running?


When do two quantities follow the unitary method?


Why my tweet is not appearing on the timeline of the person I am following?


Prove that every retraction function is an identifying function.


Chilean, Canadian national transit through the US during COVID-19

What are the current travel restrictions on individuals entering the United States from regions affected by Covid-19?


How do you find out which version of Gnome Desktop ships with a certain version of Ubuntu without installation?

How to know default software version for all Ubuntu software for a specific Ubuntu version?


FourierTransform is really inverse Fourier transform?

What are the most common pitfalls awaiting new users?


Help with Code Coverage for Milestone Completion Trigger

How do I increase my code coverage, or why can't I cover these lines?


code won't compile generates infinite 2222s


What is the git command to diff against a remote which has not been merged yet?

Git: Compare All Local Commits to Remote Repo Version


system crashed after changing /etc permission

sudo error, is mode 0777, should be 0440


How Do I populate the Last Login Date from User object into a custom object/field?

Execute an action / run a trigger every time a User logs in to Salesforce


Clicking reopen shows the reopen pop-up twice

Nominate for Reopening Shows Duplicate Message Boxes


Summary of theorems about polynomial irreducibility over Q[X]

Methods to see if a polynomial is irreducible


Cannot open Android 4.1 on PC as in mass storage mode


Transfer content of one array to another, removing duplicates

How do I remove duplicates from a C# array?


How can I safely move a module to another folder?


Reduce multiple ORs in IF statement in JavaScript


When during the casting of a spell with a long casting time do you need the target?

At what point does a caster define the target of a spell?


Lebesgue outer measure satisfies $\lambda^{*}([a,b]) \leq b-a$

On Lebesgue Outer Measure of an interval


When i random my object so its overlapping too much

random placement of rectangles with no overlaps


'Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES'


How to replace all occurrences of a string in JavaScript?


Positive correlation but negative beta coefficient


UBUNTU installation alongside Windows 10

How do I install Ubuntu alongside a pre-installed Windows with UEFI?


A Brief History of Time book in Harry Potter and the Prisoner of Azkban


How do you select a point using the API as the primary point selection?


how to get column names of a table in ms access?

Get all field names in Microsoft Access Table using SQL


Why does Type I error of a test occur? Is NHST too weak to tell the truth?

Why does Type I error always occur in a NHST? Or, is NHST too weak to tell the truth?


How to make div onClick at the content only

How to stop event propagation with inline onclick attribute?


Getting only specific pattern using locate

Locate command is returning too many results


Why does my shell script choke on whitespace or other special characters?


Data frame numeric column coerced into character vector when extracted with apply

Why does as.factor return a character when used inside apply?


What recourse do I have if I believe a moderator has abused their privileges?


Java-Null Pointer Exception in thread run method

What is a NullPointerException, and how do I fix it?


Making a model out of cubes, can't fix overlap


rails activeadmin drop down menu on new and edit forms

Changing what attribute is displayed in drop down association filter in active admin with Rails 3.1 app


How does rectilinear activation function solve the vanishing gradient problem in neural networks?


Return variable outside of a function scope in Javascript

How do I return the response from an asynchronous call?


Problems with Partitions After Remove Windows

How to Expand , Resize "extended partition"?


Problems upgrading drush from 5.10.0 to drush 7 on Ubuntu

drush/drush dev-master requires codegyre/robo ~1.0.0-beta1


How to flag an answer that does not answer the question?

Should the not-an-answer flag description be clarified?


bash file permission error while appending to a file

Redirecting stdout to a file you don't have write permission on


Attempted relative import in non-package for optional package


Restored/Wiped- Automatically enables Location Services like in LOST MODE?

Can be iPhone detected in 'Find my iPhone' service after recover?


How to Recover corrupt SQL Sever database?

How to recover data from corrupted SQL Server database?


How to perform Multipath TCP for bandwidth on Windows® 10?

Merging two incoming broadband lines for faster Internet


Rational function with absolute value $1$ on unit circle


Makefile that compiles all cpp files in a directory into separate executable

Building multiple executables with similar rules


Why are generalized positions and generalized velocities considered as independent of each other?

Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?


Variable declaration, declare as Deque or ArrayDeque = new ArrayDeque();

What does it mean to "program to an interface"?


How do I find all command blocks on my server?

I've lost a command block, how can I find it?


How do I recover my Google account (or Gmail) password or username?


Where is the code downloaded by apt source stored?

How do I get and modify the source code of packages installed through apt-get?


How to compute probabilities of normally distributed variables?


want data wrapped automatically to shorten pages we print

How to print an Excel sheet in a multi-column layout?


Does axiom of foundation/regularity protect against Russell-like paradoxes?


Prove that there is no integer a for which $a^2 - 3a - 19$ is divisible by 289


Is there any way to dynamically compress an UIImage in iPhone


Can domain masking be used to move content from a subdomain to a subdirectory?


My \mathcal{U} turns out to be curvy? (different than default)


Sole minimal element: Why not also the minimum?


How to create Ubuntu 16.04.3 on dell g3 3779


How can I create an executable JAR with dependencies using Maven?


Error when trying to update ubuntu using sudo apt-get update

Problem with sudo apt update in Ubuntu 18.04: Post-Invoke-Success if /usr/bin/test -w /var/lib/command-not-found/


How to fix a ClassCastExecption, and a NullPointerException?

What is a NullPointerException, and how do I fix it?


Running cmd commands and getting results to a string variable

How do I execute a command and get the output of the command within C++ using POSIX?


can't install Realtek RTL8723de on ubuntu 16.04 kernel 4.15

Installing Wi-Fi driver for Realtek Semiconductor RTL8723DE Device [10ec:d723]


Move files to parent directory, prefixing file name with former subdirectory name

recursively add directory name to file name


Does the word zealous have an implicit religious connotation?

Can “zealot” have a positive connotation?


Undefined reference to static class member


Is there a 64-bit version for Intel systems?

Difference between the i386 download and the amd64?


Does a photon exert a gravitational pull?


Grouping curly brace inside curly braces with Regex

Regular expression to match balanced parentheses


Prove that $\lim_{n \rightarrow \infty} \frac{1}{\sqrt{n(n+1)}} + \frac{1}{\sqrt{(n + 1)(n+2)}} + \cdots + \frac{1}{\sqrt{2n(2n + 1)}} = \ln 2$


Acceleration of a particle at the speed of light

What happens when a photon hits a mirror?


Question about implicit differentiation and y derivative


Example of a non-normal integral variety $X$ for which "algebraic Hartog's" theorem fails?

Domain strictly contained in the intersection of localizations at the primes of height one


Find the sum of the series $\sum_{n=1}^{\infty} \frac{1}{n \cdot (n+1) \cdot (n+2)}$

Find the sum of the series $\sum \frac{1}{n(n+1)(n+2)}$


Java - Compare item of String array with a String


Why did future Janeway not tell Voyager about transwarp-hubs during Scorpion I&II?

Why did Admiral Janeway choose to travel back in time to 2378?


overlay my shapefiles stored in database to the web/browser


Is the topologist's sine curve a manifold?

Topologist's Sine Curve not a regular submanifold of $\mathbb{R^2}$?


Terminating app due to uncaught 'NSUnknownKeyException',

Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error?


Does a hard disk still work (with reduced capacity) when one platter is removed?

Can HDD Platters be interchanged between different HDDs


How to disable repetitive keydown in jQuery

Prevent JavaScript keydown event from being handled multiple times while held down


Which FLOSS Python CMS for video sharing in a school?

Which Content Management System (CMS)/Wiki should I use?


Rendering fire animations with transparent background


Is the Axiom of Choice restricted to $\Bbb R$ independent of ZF?

Choice function for a collection of nonempty subsets of $\{0,1\}^\omega$


ubuntu tuptime daily and date wise system uptime

How do I find the last logged system boot and shutdown times?


Can I use a SVG object in place of an img file on web page?


What is a NullPointerException, and how do I fix it?


Can my 84-year-old mother travel from Pune to Hydrabad with no ID documents?

What are the documents we need to carry for flight journey within India?


How to prove an equivalence relation without knowledge of the group?

$x$ conjugate to $y$ in a group $G$ is an equivalence relation on $G$


Why does 'extends Thread' exist, when 'implements Runnable' is winner in all cases

"implements Runnable" vs "extends Thread" in Java


"friend" classes in C# and the state pattern


Is appending the hash of the plaintext to the end of an encrypted message sufficient to ensure integrity?

Why is plain-hash-then-encrypt not a secure MAC?


Build a proper Cycles shadow pass in the compositor

Cycles: Shadeless "Shadow-catcher" Material for Rendering onto Footage


How to create a matrix with n*n dimensions which is not an exact number?

Build a Companion Matrix of a Polynomial?


In MATLAB, how can you have a callback execute while a slider is being dragged?


Let $\Bbb R$ be a field of all real numbers. Prove that $x+1$ is not a unit in $\Bbb R[x]$.

Why can't the Polynomial Ring be a Field?


Setting up multiple Windows 10 PCs using a single image


What do they care about most? or What do they care about the most?


Why does my Array give me this "[I@106d69c" output always?

What's the simplest way to print a Java array?


How to install ooVoo on ubuntu 12.04 64 bit


GCD of $a+b$ and $\frac{a^p + b^p}{a+b}$


Search whole database instead of single table


How to obtain this shade of green in my Beamer theme? Why is the RGB relative to that hex not working?


Indicating a name change after publication


Why do I see two desktop.ini files on my Windows Desktop?

Why do I have two desktop.ini files on my windows 8 desktop?


How to find out if a model is overfitted?

How to judge if a supervised machine learning model is overfitting or not?


Let $G$ be an abelian group. Show that the mapping $\phi:G\to G$ given by $\phi(x) = x^{-1}$ is an automorphism of $G$.

Characterize the groups $G$ for which the map $\iota: G \to G$, sending $x \mapsto x^{-1}$ for all $x \in G$, is an automorphism of $G$


How does an antiparticle respond to a gravitational field?

Does antimatter curve spacetime in the opposite direction as matter?


HTTPURLConnection Doesn't Follow Redirect from HTTP to HTTPS


Microsoft .NET Chart control - select points using rectangle


Not allow a blank character / space in a input form

How to prevent invalid characters from being typed into input fields


Repeat for loop 10 times in shell script


Show $\int_{\mathbb{R}} |f(x)|dx = \int_0^\infty m(\{x:|f(x)| > t\})dt$

Why is $\int_{-\infty}^\infty |g(x)|\,dx = \int_0^\infty \mu(\{x : |g(x)| \ge t\})\,dt$ true?


Can you help me with my capacity planning?


Find volume of a translated and rotated ellipsoid below xy (horizontal) plane


How to get the interval after change of variables?


How can I change '>' to '>' and '>' to '>'?


Understanding the definition of proposition (Mathematical Logic)


gcd between powers of two co-prime numbers

Prove that if $\gcd(a,b)=1$ then $\gcd(a^m, b)=1$


java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.GridView.setAdapter

What is a NullPointerException, and how do I fix it?


Derived class that inherits virtual class c++


"Data at the root level is invalid" error when adding ResourceDictionary


World of Warcraft Stopped Downloading Ubuntu 13.10


show that if $M \times \mathbb{R}^{n}$ is orientable than so is $M$


Is it possible $\sin\alpha=\cos\alpha=1?$


variable === undefined vs. typeof variable === "undefined"


Prove if $AB=BA $ and $BC=CB$ then $AC=CA$.

$AB=BA$, $AC=CA$ we need to show $BC=CB$


What are the minimum content and traffic requirements for Google AdSense?


Duplicate question from same user, neither one has answers

How to handle a deliberate duplicate question


Blog - sometimes you can comment other times you cannot - why?

What happened to the comments section on the blog?


how to simulate a rocket exhaust engine like shown below

How to create a fire/light effect in a spaceship engine


Div is popping out of outer div when display smaller

Expanding a parent  to the height of its children


How do I completely remove an image from my .blend file?


What happened to Gandalf's body when he 'died' atop the mountain?

What happened to Gandalf the Grey's body when he was sent back as Gandalf the White?


Use of "a-" before words, not the indefinite article

What is the history of adding the a- prefix to form words?


Whether making changes from one of the answer is fine?

Editing the question such that it answers itself


Should the same source be cited repeatedly in a chapter?

How do I cite same reference multiple times in a paper?


Is this PHP code vulnerable to SQL injection?


What's the correct way to import a symbol from another font compatible with XeLaTeX/LuaLatex?

Importing a Single Symbol From a Different Font


How to pick and differentiate a flat color?


how to get binded list in [HttpPost] action?


"Equidistant" spectra in quantum mechanics

Is the harmonic oscillator potential unique in having equally spaced discrete energy levels?


Is there any way to only give power to my SSD (not HDD)


onkeypress registers enter key multiple times on dynamically created DOM using jquery

Event binding on dynamically created elements?


How to make user.html.twig template for two different pages (users)?

White screen of death: Fatal error: Allowed memory size of X bytes exhausted


How do we use a abstract class as a function return type?

What is a smart pointer and when should I use one?


Is there a way to orient an object to my view?


Is there a hypothesis test for B1 > B2 in multiple regression?

Testing whether two regression coefficients are significantly different (in R ideally)


"have been requested", "has been" or "had been"

How do the tenses and aspects in English correspond temporally to one another?


Do I need an antivirus program? Will McAfee work on Ubuntu?

Do I need to have antivirus software installed?


How to change the attribute using jquery?

How can I change HTML attribute names with jQuery?


Prove that the coordinate projection $P: E\times F\rightarrow E$ is an open map.

Prove that the projection $p_i$ from the product space $X_I S_i \tau$ into $S_i \tau_i$ is open for each $i \in I$


mkpasswd -m sha-512 password -s "22446688"

Why 'mkpasswd -m sha-512' produce different result every time it is called?


Why won't my Broadcom BCM4312 LP-PHY work with the STA driver?


Automatically signed up for all Stack Exchange

Automatically create accounts in all sister sites


Best conditional statement for many instances python

Replacements for switch statement in Python?


I want to know about the quantization of mass


Upgrade Sony VAIO laptop from Windows ME to Ubuntu

How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements?


Getting error java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()'

What is a NullPointerException, and how do I fix it?


How to "push' a new item to the middle of an array?

How to insert an item into an array at a specific index (JavaScript)?


How to illuminate the darkness inside glass objects in Cycles?


Why do universities/research agencies allow their employees to do free peer reviewing which financially benefits a third party?

Why don't researchers request payment for refereeing?


How to get JSON data in chunks to report on progress?


How can we improve the experience for non-native speakers on Stack Overflow?


What am I doing wrong with the qtree function?

I'm getting the error: ! Paragraph ended before \@@label was complete


Complete files from a different directory in bash


ubuntu 14.04 artifacts scren when installing

My computer boots to a black screen, what options do I have to fix it?


What is a "closed" or "duplicate" question?


Determining PCA scores for a new data point

How to project a new vector onto PCA space?


How can I check the integrity of a downloaded Ubuntu CD?


Is there an elegant way to increment the index of 'arr' without x?


How to get condition where date > 24 hours

How do I get the number of days between two dates in JavaScript?


Korean transit visa for Uzbekistan citizens

Do I need Korea Visa when transit at Incheon Airport, as an Indonesian citizen?


$f \in \mathcal l^{\infty}{'} $ ; $f(x)\ge 0$ whenever $x \in \mathcal l^{\infty} $ is a sequence of non-negative terms ; is $f$ bounded?

Any positive linear functional $\phi$ on $\ell^\infty$ is a bounded linear operator and has $\|\phi \| = \phi((1,1,...)) $


How can I remove "Activities" bar at the top?


Why my overload inherit function is not hiding a base function?


Limit offset support for SQL Server 2008


Should I convert US dollars to euros while in USA or in Europe?

What is the best method for exchanging dollars for Euros?


What is the math knowledge necessary for starting Quantum Mechanics?


Why is text files compressed folder bigger than the original folder?

Why does a zip file appear larger than the source file especially when it is text?


Is it possible to use \usetikzlibrary inside a figure?

Is it possible to load a TikZ library locally?


Changing array in method changes array outside

Is Java "pass-by-reference" or "pass-by-value"?


How to understand backpropagation using derivative

Role derivative of sigmoid function in neural networks


LibreOffice compares numbers incorrectly


How to make duplicated object be colored independently?

How to put a unique material on duplicated objects separately?


Blender render crash when using subsurf modifiers.


How to read all files in one directory into R at once?


Does Euler's Formula prove all imaginary numbers equal $0$?


Why was Dolores Umbridge not removed from the Ministry of Magic earlier?

Why was Dolores Umbridge not arrested after the end of Harry's fifth year?


How to move Ubuntu installation from one hdd to another?


Newbie having trouble with background color

How can I improve my color selection skill?


Energy-level choice for electron at photon emission

Do we really not know why atoms 'decide' to produce a photon?


Redirect, Change URLs or Redirect HTTP to HTTPS in Apache - Everything You Ever Wanted to Know About mod_rewrite Rules but Were Afraid to Ask


Any way to find out what US Customs & Border Protection has in their database on me?


Can Ubuntu repair windows 7 that won't boot?

How to restore Windows 7 MBR without a CD


A single word for talking about a subject at great lengths?

Word to describe "when someone describes something in too much detail"


How to associate a file type in Firemonkey OSX?

How to associate file type with MacOS X App without launching it first?


Is there an antonym to 'hypochondria'/'hypochondriac'?

Word for the opposite of "hypochondriasis"


What is the most general conception/formalization of "energy"?

What's the real fundamental definition of energy?


Not sure why my program doesn't work (getting a null pointer exception error)

What is a NullPointerException, and how do I fix it?


bash: test: no: integer expression expected


Does there exist a first category set that is not $F_\sigma$?

If a set is $F_\sigma$ and is of first category then it is a countable union of closed nowhere dense sets


android.view.inflateexception binary xml file line #6 error or inflating class fragment


What is the difference between String and string in C#?


How can I calculate a point's coordinates given distances from three other known points?

Finding location of a point on 2D plane, given the distances to three other know points


Installing Ubuntu Server 12.04.3 using Raid 1, Need a step by step guide


In Perl, what is the difference between accessing an array element using @a[$i] as opposed to using $a[$i]?


Rotational mechanics collision problem of a rod and body


How to install LibreOffice Manually in Lubuntu 13.04?

How do I install a .tar.gz (or .tar.bz2) file?


How to compute the inverse of a polynomial under $GF(2^8)$?


Connect to PC server from PlayStation minecraft

Are the XBLA and PC versions of Minecraft compatible?


Is there a more efficiency way to adjust items in a nav bar than padding-left


Do Cantrips use your character level or class level?


Rewiring outlet from half-hot to full-hot

How can I rewire half switched receptacles?


How to remove blank lines from a file (including tab and spaces)?


70-year old short story about thinking way into another dimension, parallel universe

Short story where a character moves through dimensions via mental exercises


Proper order of optimizing hyperparameters in ANN

Is there a thumb-rule for designing neural-networks?


Can I use Angular variables as the source of an audio tag?

HTML5 Video is not working with AngularJS ng-src tag


How to remove deleted chatroom from favorite rooms?


Lenovo y40 will not allow me to install ubuntu

My computer boots to a black screen, what options do I have to fix it?


iOS multi-step form and user input validation


Trisquel:What to type when I set a blank password?


How can I install Skype on 32-bit Ubuntu 14.04?


How can I show the contact number of the Dialed contact

How can I see the phone number dialed after I initiate a call?


What does the "free" in *free abelian group* or *free group* mean?


How to trigger a timer tick programmatically?


Should I say "I don't know nothing" or "I know nothing"?

How is double negation interpreted in English?


How to add 7 days to current date while not going over available days of a month?


Why doesn't Stdev take absolute value of x- xbar?

Why square the difference instead of taking the absolute value in standard deviation?


Behavior of $f'(x)$ as $x \to \infty$ given the behavior of $f(x)$ and $f''(x)$

If $f(x)\to 0$ as $x\to\infty$ and $f''$ is bounded, show that $f'(x)\to0$ as $x\to\infty$


How to make sure that values written in a textfield are the same using a simple loop function?


How do I not auto-select auto-suggestions in the address bar of Chrome?

How to turn off chrome's annoying auto-fill?


How to pass paramters to a dynamically created apex class

Pass parameters to constructor when using System.Type.newInstance()


Why did Loki surrender in Avengers? If he did this willingly, what were his intentions?

Is Loki responsible for the division between Avengers when they were all on Helicarrier?


Finding and removing duplicate files of a specific file extension or type in OS X with a script?

Finding and removing duplicate files in osx with a script


Confusion about the regularity axiom, the specification axiom, and the existence of the universe

What is the purpose of the Axiom of regularity/foundation?


What are other ways of saying "to keep moving forward in times of hardship?"

Single word which means "keep moving forward"


Was Arcanine originally intended to be a Legendary Pokemon?

Why was Arcanine with the Legendary Birds in Veridian City in Pokémon Origins?


prove $\sqrt{a_n b_n}$ and $\frac{1}{2}(a_n+b_n)$ have same limit


Is there no scope for asking opinion-based questions on Stack Exchange?

Give each site a parallel site for polling, recommendations and subjective-ish stuff


After 13.04 installation, computer only boots to windows

How can I repair grub? (How to get Ubuntu back after installing Windows?)


How can I effectively save a lot of money for retirement when a 401k is not available?

Saving for retirement without employer sponsored plan


Editor that replaces only text inside math environments


PDO: Passing extra parameters to a prepared statment than needed


Why do I see myself twice when I run the who command?


Determine the less value of $n\in\mathbb{N}$ for $S_{n}$ having an element of order $200$

Finding the smallest positive integer $n$ such that $S_n$ contains an element of order 60.


Connectedness of the One-Point Compactification

Can $X$ have compact connected components?


python: where do user defined classes override object's __setattr__ method?

Can't set attributes on instance of "object" class


Sum of rows conditional on two conditions

Excel - Sum values if their row meets more than one criteria


Where did the "unavailable" meaning of "Out of Pocket" come from?


Does Hexblade's Curse extra damage affect every die rolled?

If I roll 2d8 and 1d6 for damage, how many "damage rolls" is that? 1, 2, or 3?


ASP.NET MVC 3, receive JSON partially as a dictionary?


How to get a photoshop font look like math mode in tex?

What is the name of the default font in math mode?


DSolve throws an error about Solve and returns unevaluated


Sed to merge lines that are delimited with a token

Replace comma with newline following with just a command and space


What countries allow the most visa free / visa on arrival entries?

Countries with no visa requirements on its visitors


How to convert byte[512] to string 1024 length

How do you convert a byte array to a hexadecimal string, and vice versa?


What does this mean? I am trying to upgrade my version 12.04 Ubuntu

How to install software or upgrade from an old unsupported release?


greatest common divisor of a cyclic group generator

Proof involving Cyclic group, generator and GCD


Reference request: Relation between $Sp(N)$, $Spin(N) $, $SU(N)$ groups and physics

Comprehensive book on group theory for physicists?


Are there non-convergent cauchy sequences?

A "non-trivial" example of a Cauchy sequence that does not converge?


Change the bibliography name scrartcl class

How to change the name of document elements like "Figure", "Contents", "Bibliography", "Appendix", etc.?


What does /dev/null mean in a shell script?


Can you go to a country with other passport when home citizenship is not allowed in country?

Visiting Iran as a dual EU-American citizen


Include a PDF-file and write text above on the same page


Mismatch between analytical and simulation way for Bayesian estimation of binomial data

Discrepancy between calculated and simulated error propagation


How do I install applications in Ubuntu?


How to write today's date which does not change afterwards?


A word for non-supernatural “superstitions”?

What is another word for a false belief or opinion on something that people hold true and repeat because they have heard it repeated so many times?


Asked question without registering, can't see my question after registration

How can one link / merge / combine / associate two accounts / users? (Anonymous / unregistered / cookie, or Google / Facebook / registered)


Without using Dirichlet's theorem, show that there are infinitely primes congruent to $a$ mod n if $a^2\equiv 1\,(\!\bmod\; n)$

Dirichlet's theorem on primes in arithmetic progression


Flag dialog for faded offensive posts appears below answer editor

Flag dialogs for grayed-out posts are also grayed-out


Values of $\sum_{n=0}^\infty x^n$ and $\sum_{n=0}^N x^n$


Why does no line appear when using Interpolate Line in ArcMap?


NullPointerException in android activity

What is a NullPointerException, and how do I fix it?


What is the proper way of creating installation media from Ubuntu iso?


Can't Install anything from Ubuntu Software Center in Ubuntu 15.10

How do I fix a "Failed to download package files" error?


entire function that misses $[0,1]$ is constant

If $f(\mathbb{C})\subset \mathbb{C}-[0,1]$ then $f$ is constant


simply python question: how do I append all elements in list of list

What is the difference between Python's list methods append and extend?


how do I resolve the NPE error in SharedPreferance?


How can I save the Mavericks download from the App Store to minimize downloads?


How to redirect or load new PHP page from PHP using jquery?


Why does continuous linear functional $f$ in topological space $V$ have to have an inverse?

The preimage of continuous function on a closed set is closed.


How to align a set of very long equations


How to determine the options Linux kernel was build with?

Where kernel configuration file is stored?


Is it possible to say that product of positive strictly quasiconcave functions is a quasiconcave function?

Is the product of strictly quasiconcave functions quasiconcave?


How to get user to actually enter full name in "Full Name" field


My home internet is extremely unreliable. I can't seem to know why?


Page numbering is one off in Table of Contents

How to use pagenumbering in the document?


Can you resolve this problem in context with the use of 'will'?

"When this battle will be finally over" - shouldn't it be "When this battle is finally over"?


"SHOWPLAN permission denied in database 'StackOverflow'." again

SHOWPLAN permission denied when including execution plan in Data Explorer


How fast is an atomic/interlocked variable compared to a lock, with or without contention?

Overhead of using locks instead of atomic intrinsics


How to write specific CSS for mozilla, chrome and IE


Show that any orthogonal matrix has determinant 1 or -1

A better proof for $\det(P) = \pm1$ if $P$ is an orthogonal matrix


how can I use light nodes for lights in Blender 2.9?


R: how to export my Kriging result to raster?


Where is the flaw in this "proof" that 1=2? (Derivative of repeated addition)


How long are the life phases of a dragon?


What's the subject of "There is my biscuit!" ? And how about "There is one biscuit left"?


Make VIM reload file as soon as it changes on disk

Text editor that updates file without prompting


how to calculate the sum of $1^k+2^k+3^k+\dots+n^k$

A formula for the power sums: $1^n+2^n+\dotsc +k^n=\,$?


Find the amount of water in ith cup in a pyramid structure?


Wordpress Website now showing 404 Error? Can't fix

How do I deal with a compromised server?


Would too much sensor cleaning reduce image quality

Is it risky or difficult to wet clean an image sensor?


The amount of time since the system was last booted

How long system has been awake / running / since restart


DML operation on setup object is not permitted after you have updated a non-setup object


Prove that every bijection of the set into itself is representable as a composition of two involutions.


I receive all emails from my php form in spam. How can i solve it?

How do you make sure email you send programmatically is not automatically marked as spam?


What can I do if a repository/PPA does not have a Release file?


Using variable in building a Regular Expression

How do you use a variable in a regular expression?


How to "compose" a number knowing its bits value in C/C++

How do you set, clear, and toggle a single bit?


Area of largest inscribed rectangle in an ellipse. Can I square the area before taking the derivative?

Find the area of largest rectangle that can be inscribed in an ellipse


Does anyone have code for routines to create the namespace in Dynamic CRM, to set a field visible in a form?


Why is my crontab not working, and how can I troubleshoot it?


Making Ctrl+C copy text in gnome-terminal?


What type of data is available at the "census block" level?


Two Limits Equal - Proof that $\lim_{n\to\infty }a_n=L$ implies $\lim_{n\to\infty }\frac{\sum_1^na_k}n=L$

Prove convergence of the sequence $(z_1+z_2+\cdots + z_n)/n$ of Cesaro means


Android MapView zoom level doesn't exceed 19?

android mapview maximum zoom level only 19


How to connect functions in text file to programmed functions in source code?

Calling a function of a module by using its name (a string)


Installing a Theme with the Gnome Tweak Tool?


How to add common Java Script function to all div generated dynamically?

Event binding on dynamically created elements?


Using dpkg to install upgrade and dist-upgrade packages


How can I import the configuration on a different site?


sizeof() returning different values when called on the same array in the main function and another function

When a function has a specific-size array parameter, why is it replaced with a pointer?


How to remove Ubuntu and put Windows back on?


Why is function(char * array[]) a valid function definition but not (char (*array)[] in C?


is there a library to print blank calendars?

LaTeX Classes or Styles for Schedules and/or Calendars?


Irreducible polynomial $f$ has at least one root over $\mathbb{F}[x]/f$

How do I show that $x$ is a root of $p(x)$ in $F[x]/\langle p(x)\rangle$?


Divisibility criteria for $7,11,13,17,19$


Remove grey outline from Lightning component

Lightning QuickAction background color change


Is using 'var' to declare variables optional?

What is the purpose of the var keyword and when should I use it (or omit it)?


Number of elements in $GL_2(\mathbb Z_p)$

What is the number of invertible $n\times n$ matrices in $\operatorname{GL}_n(F)$?


Website not appearing on Bing.com: what am I doing wrong?

Why aren't search engines indexing my content?


How to get bokeh or macro on E-M10 Mark II with 14-42mm Black EZ Lens?

How can I get dramatic shallow DOF with a kit lens?


Java thread program exits before for loop (server side of program) (Eclipse using Mac Terminal/command line arguments)


Private field accessible from another instance of the same class

Why and how does C# allow accessing private variables outside the class itself when it's within the same containing class?


Is it allowed/desirable to post code snippets?


How to install Lubuntu on iMac PowerPC G5

How do I install Ubuntu on my Mac PowerPC G5


What is the Stack Exchange site to ask questions regarding Microsoft Windows?

Are there 'stack' sites for Mac or Windows?


Pass object of a class to a method of another class

Is Java "pass-by-reference" or "pass-by-value"?


Multiple Inheritance and which destructors to make virtual? How come A is not allowed but B is?


Getting reliable MSISDN from Android Phone? VoiceMailNumber Line1Number

MSISDN : Is it a SIM Card Data? Why all The Provided Function (from Blackberry and Android) to fetch MSISDN not reliable?


Can Button[] generate output without using Print[]?


Move boot partition from one internal hard drive to another

How can I move the boot sector to another drive?


Error: GDBus.Error:org.freedesktop.systemd1.UnitMasked: Unit -.mount is masked


Is it right to use the words Deep/Shallow copy of a pointer

What is the difference between a deep copy and a shallow copy?


How to make a "fat jar" of a Maven project?

How can I create an executable JAR with dependencies using Maven?


How can you rotate text for UIButton and UILabel in Objective-C?


What is a NullPointerException, and how do I fix it?


Is there any asymmetric encryption algorithm for eliptic curve(secp256k1) without AES?

Can elliptic curve cryptography encrypt with public key and decrypt with private key like RSA?


Software centre neither update does not work on 12.04

How do I remove a malformed line from my sources.list?


Is there a way to set the actual size of an external display for extending the desktop?

2 monitors - different resolutions - cursor between monitors


Trigger VBA code to run after a new mail is received in Outlook?

How do I trigger a macro to run after a new mail is received in Outlook?


Solid State Drive is full within less than two hours


What is 'casting nines' - how and why does it work mathematically?

Why $9$ & $11$ are special in divisibility tests using decimal digit sums? (casting out nines & elevens)


How to run external executable using JavaScript in Visual Studio 2012 for Windows 8

Is there a possibility to start another App or Program from a Windows 8 Store App (C#)


NPE when testing servlet with testNG and Mockito


SE Android app for tablet has bad formatting on feed


Problem with finding the limit using integral and summation

Using right-hand Riemann sum to evaluate the limit of $ \frac{n}{n^2+1}+ \cdots+\frac{n}{n^2+n^2}$


How to free up "Other" in Storage Management

How can I figure out what's slowly eating my HD space?


Proof that any fractional number squared is also fractional?

Prove that the square root of a positive integer is either an integer or irrational


17.04 Mate. Can't set background with setbg

How to change desktop background from command line in Unity?


How do I concatenate a string and an integer to make a filename?

How to concatenate a std::string and an int


Determining the rank of an $n \times n$ matrix

Let $A$ be a $n\times n$ matrix with entries $a_{ij}=i+j $ . Calculate rank of $A$


Is the series $\frac{1}{p_n}$ ,where $p_n$ is $n^{th}$ prime number, convergent or divergent?

Showing $\sum\limits_{p \in P} \frac{1}{p}$ where $P$ is the set of all primes is divergent


Ruby on Rails: Can you put Ruby code in a YAML config file?


How do I recreate this color overlay layer effect in Photoshop?


Mesh: Plastic bottle curved indent, boolean or displacement map? Or maybe something else?

How would I make these curved indents in this water bottle? Picture in description.


For $x_1,..,x_n \in \mathbb{R}$, what is the value of $\mu$ that minimizes $\sum_{i = 1}^{n}|x_i-\mu|$?

The median minimizes the sum of absolute deviations (the $ {\ell}_{1} $ norm)


System message breaks mobile site layout


How do you connect to multiple databases on a single webpage?

How do you connect to multiple MySQL databases on a single webpage?


Novel where main character discovers dragons hidden in castle?

Novel about a dragon lord who has to wear gloves at all times


The servlets named [create_subscription] and [servlet.create] are both mapped to the url-pattern [/create] which is not permitted

java.lang.IllegalArgumentException: The servlets named [X] and [Y] are both mapped to the url-pattern [/url] which is not permitted


Selecting the best subset of features in binary logistic regression

How to select a subset of variables from my original long list in order to perform logistic regression analysis?


Is a Rackspace Cloud Server right for me?

How do you do load testing and capacity planning for web sites?


How do you get the footer to stay at the bottom of a Web page?


I just featured a question on meta...and I'm not a moderator

I can add moderator only tag via a suggested edit, and I got no diamond!


Cant install python 3.6.3 on ubuntu 16.04

dpkg error: "trying to overwrite file, which is also in..."


Difference between various methods for producing text in math mode


Updating address bar with new URL without hash or reloading the page

How do I modify the URL without reloading the page?


iPod iOS 5.1.1 safe mode without any touchscreen controls


Why failing to install ubuntu on Asus g551 laptop

How do I install Ubuntu alongside a pre-installed Windows with UEFI?


Write number with + before it if it is positive

Custom numeric format string to always display the sign


Can I change the order in which hook implementation by different modules are called?


Minecraft vanilla crashes on world load?

Minecraft crashes on world load with "java.lang.IllegalStateException: failed to create a child event loop"


How to run VMWare ESX or ESXi in a virtual machine?


How do I simply run an ubuntu touch app from the terminal?


Removed Python 3 and now Ubuntu Software Center, terminal and other applications don't work


Java: How do I create a movie from an array of images?


How can I convert an integer into its verbal representation?


UK visa refusal on V 4.2 a + c (and sometimes 'e')


How Do I Install Windows 10 To An External SSD Drive Under My Particular Config?

Is it possible to use Boot Camp with Windows 10 from an external HDD?


How to make jar file run automatically on system start

How to make a jar file run on startup & and when you log out?


Java Exception: NoClassDefFoundError even if place the jar files into classpath correctly

Why am I getting a NoClassDefFoundError in Java?


Express Planck's Law for blackbody radiation in terms of frequency


What should the relationship between significance and correlation be?

How do you interpret a significant but weak correlation?


error "grub-mkconfig: You must run this as root"


Why can templates only be implemented in the header file?


Recovering Grub after installing windows 8.1

How can I repair grub? (How to get Ubuntu back after installing Windows?)


awk: detect content separated by arbitrary character instead of spaces?

extract the 4th column from a csv file using unix command


"Every 30 min" cron expression runs only hourly

How to run a scheduled job every 15 minutes?


Better HTTPS support for Stack Exchange sites


OpenSSL get's the server SSL key instead of the website SSL key

OpenSSL returns different SSL certificate to that shown by Chrome


Why are .deb packages of hplip not sufficient?

How to install latest HPLIP on my Ubuntu to support my HP printer and/or scanner?


What happens when you evolve a pokemon while it's in a gym?

Can I level up my Pokémon while they are at gyms?


Options for a functional-style enthusiast?

Is there any game engine using a functional programming language?


Null Pointer Exception when filling a 2d array

What is a NullPointerException, and how do I fix it?


How can I use all my Gmail accounts in one place?

How to login in two accounts in the same browser?


Is there a place to ask opinion based questions?

Give each site a parallel site for polling, recommendations and subjective-ish stuff


Displaced margins in beamer footer after MikTeX update

Bad alignment of Author and Title in Beamer class (Warsaw theme)


How to prove $ \phi(n) = n/2$ iff $n = 2^k$?


Is there any analytics information that moderators can access for individual questions?


How are "anded" 'if' conditions evaluated?

Difference between | and || or & and && for comparison


Linked lists: sum up all of the values to the right of the minimum value


Check if an item exist in the dictionary and remove it from the dictionary in C#

Remove Item in Dictionary based on Value


Why we take Schrodinger equation as a complex quantity? Why wavefunction is a complex quantity?

About the complex nature of the wave function?


Taking a portrait with both the sun and model visible. How to use my flash?

How can I take a sun backlight portrait like these examples?


How to compute the  formula $\sum  \limits_{r=1}^d r \cdot 2^r$?


Relation between Linux and Android kernel versions

What is the difference between the Linux Kernel and the Android Kernel?


Method of image charges: How does it work?

What is the justification for the method of images in electrostatics?


Compute $ \lim\limits_{n \to \infty }\sin \sin \dots\sin n$


Variable not Initialized - Although I am?

Why do I get a "variable might not have been initialized" compiler error in my switch block?


What are the limits of the Prime-functions?


Is it possible to use a Cleric's Melee power with a Non-Melee weapon?

Are there recommendations or pitfalls for playing an archer cleric?


Will everything eventually be a single black hole?


For what purposes is my user id used when sharing a link?


Why do we use number 31 while calculating hashcode

Why does Java's hashCode() in String use 31 as a multiplier?


Transparent window backgrounds/titlebars in Windows 10

Is it possible to enable Aero Glass again in Windows 10 for Windows titles?


Please evaluate the limit L given below.

How to evaluate $\lim\limits_{n\to+\infty} \prod\limits_{k=1}^n (1+k/n^2)$?


Tag info not updated regularly on profile?


How do you set your own intercept in SPSS?

Perform linear regression, but force solution to go through some particular data points


'Earth' or 'earth' in Christian/theological texts


Based on the product name ,split data with year and get the column count in visual force page pdf

Split Data Based on Year in a Visual force Page PDF


Will I be able to unlock Panna City Medicines now that the decoration special is finished?

Is there any way to restart the Tiny Death Star Holiday Decoration Event?


Illustrator Vector Graphics Appearing Pixellated


Name of latex font using in the document (see picture)

How do I find out what fonts are used in a document/picture?


Joining raster layer and vector (points) in ArcGIS 10

Extracting raster DEM elevations to vector attribute tables in ArcGIS Desktop?


Is there a cooking offshoot to Stack Exchange?


`sudo echo "bla" >> /etc/sysctl.conf` permission denied


Wrong function of the code in C. the program seems to display garbage

How do I determine the size of my array in C?


String.format not applicable for the arguments in a timer application

The method format(String, Object[]) in the type String is not applicable for the arguments (...)


How to use ng-repeat without specific name in AngularJs

How to use ng-repeat for dictionaries in AngularJs?


For how many primes $p$ is $p^2 + 2$ is also prime?

Prove that if $p$ is a prime such that $p^2+2$ is a prime then $p=3$.


Python Regex convert matches to a dictionary

What special characters must be escaped in regular expressions?


Is there any way to have kids on a console


How to select a radio button by default?

Assign an initial value to radio button as checked


Is using only HTTPS bad in a SEO perspective?


Blender image output is greyish and not white


if $\mathbb A \ne \emptyset$, then $\{a \in \bigcup \mathbb A | \forall A \in \mathbb A\ : a \in A \}$ is also a set?


How is the minimum of a set of IID random variables distributed?


How to use iMac (27-inch, Late 2013) as a second monitor for Macbook Pro (13-inch, 2020)?

What are the requirements to use iMac screen as a second monitor - Target Display Mode?


Adding a symbol to nodes near coords in pgfplots

How can I draw a pretty population pyramid graph with pgfplots?


Field hidden via CSS always validates to true


multiplying lists function, did not understand the output.python

List of lists changes reflected across sublists unexpectedly


How to get all nodes with a particular relationship from a given node using neo4j-scala wrapper?

Retrieving neo4j nodes related to a given node using scala


How to compile a Qt app so that Microsoft's dll are not needed?

How to build Qt 4.8/5.2 statically under VS2012, using the static MSVC runtime, with Windows XP support?


How is viscosity described on the molecular level?


Select on change event disappear after tr modification

Event binding on dynamically created elements?


How can I best take portraits in strong sunlight, without a flash or reflector?


How do I display images with matching text in the search results page?

Include images from pages in wp search.php results in default wp search


Put [stack-exchange] in the stack for tag exchanges


Using ogr2ogr to reproject and rename into shapefile?


What is a NullPointerException, and how do I fix it?


Length of varchar column - is there an advantage to using 255?


Choosing power supply, how to get the voltage and current ratings?


What is the difference between running my app with coffee vs compile it and the run it as javascript?

Use "coffee" instead of "node" command in production


How to fix an array method throwing a NullPointerException in Java?


How to enqueue stylesheet after rtl.css?

Enqueue Stylesheets After Theme's "rtl.css"


Editting en_US.dic file with custom words

What do the acronyms mean after the slash in the Firefox dictionary?


If a bounty question doesn't award bounty to any answer, what will happen to bounty?


How can I highlight a keyword that contains a dash or a slash?

How can I get identifier style to apply to '%' (in a Perl listing)?


question "on hold" still accepted an answer

How was this answer posted after this question was closed?


Are Chinese websites unfriendly to Google optimization? Why does my website always fail to rank on Google?

SEO Optimization and Country Coded Domains


How to resolve high priority issue at the time of delivery

How to handle client if you found a high severity defect on the release date?


How to explain change of sign on regression coefficient when another variable is added to OLS model?

Is there a difference between 'controlling for' and 'ignoring' other variables in multiple regression?


How to deal with about invoke virtual method 'void android.view.View.setBackground(Drawable)' on a null object reference

What is a NullPointerException, and how do I fix it?


UIButton moves out of highlighted mode after a second


How do I prove that $(A + B)^2 = A^2 + 2AB + B^2$

Why in these matrices are $AB=BA$ not equal? What is the logic behind them?


Return Code Best Practices in Windows apps


is Photron Stedy Pro 560 compatible with canon 600d


Implementing the zoom in and zoom out in a Plotting Calculator


Open source java library for HTML to text conversion


Ubuntu 17.10 gnome-software process using large amounts of memory


Homology of orientable surface of genus $g$


How do I get the minimum value of two CGFloats in Swift?


Variance of number of tails in a coin-toss experiment


When to use a function inside a variable vs a standalone function

var functionName = function() {} vs function functionName() {}


"Provide you with something" vs "Provide you something"?


What does it mean to transform a random variable into a different distribution?

Intuitive explanation for density of transformed variable?


Black screen after boot in Ubuntu 15.04 (x86_64), Intel HD5500 (i915 driver)

After logging in, there's a black screen and my cursor, nothing else! in Ubuntu 12.10


php - convert 2012-06-25 19:00:00 to another format

Convert one date format into another in PHP


How to use "`" in the same way it is used on the SE websites?


Why is asking for application recommendations considered Off-topic?

Where can I ask a question about finding general software that meets certain requirements?


Using Ubuntu 10.04, is developing sites in my home folder instead of /var/www a significant security risk?

Is it okay to use symbolic links in my web server?


Ways to reach Hogwarts school of witchcraft and Wizardry?

Are there other conventional transports to Hogwarts/Hogsmeade?


Can anyone provide my the sample cover letter or can assist my what and how to write cover letter?

What details should a good cover letter contain to back up a UK Visit Visa application?


Cannot implicitly convert type to ActionResult


How to avoid cutting labels along the map border?

Prevent labels being cut off / clipped at edge of map


Infinitely many prime divisors of $f(a)$

Infiniteness of set of primes such $f$ have root $\mod p$


Confusion about usage of "who" in a relative clause

"Give him a box that everyone knows what it contains."


How would you judge this qq plot? Distributional assumptions? Outliers?


iPad connects to Wifi but not to Internet

Connected to wifi successfully, but no internet connection


How can I manually install a package on MiKTeX (Windows)


Document showing null while parsing with xml

What is a NullPointerException, and how do I fix it?


In season 1 episode 7 "Justice" of Star Trek TNG didn't they violate the prime directive by introducing themselves to a non-warp society?

Why does the Prime Directive not apply to Rubicun III?


Allow the owner of a post to approve a suggested edit even if it was rejected by reviewers

Could authors overturn recent community review decisions?


How to host my webpage in the LAN Network

How to access your website through LAN in ASP.NET


Two-column bibliography in one-column document

biblatex/multicol: Incorrect vertical space after bibliography heading


How can I get a paper if our library is not subscribed to the journal?

Ways to get free and legal access to research papers as a researcher


How to save image bitmap after rotation?


How to install software or upgrade from an old unsupported release?


Can I fit a Minolta 35mm lens to a Micro 4third mount?

Can I use lens brand X on interchangeable lens camera brand Y?


What's happen? Suddenly No Sound + Youtube's Videos are played Too Fast in 13.04

No sound and flash videos play super fast after daily update


site doesn't appear on google search in different countries

SEO Optimization and Country Coded Domains


Does a creature need to roll Stealth check again if it moves?


Why are transition amplitudes more fundamental than probabilities in quantum mechanics?

Why is the application of probability in QM fundamentally different from application of probability in other areas?


10+ Years Old Website are Suddenly Showing 404 Cache Error

"404. That’s an error." when viewing from Google cache


Why the outer shell in the cylindrical capacitor doesn't contribute to the field of the capacitor?

Electric Field from charged sphere within another charged sphere does not reinforce?


Connect two point in page using short ruler

How can we draw a line between two distant points using a finite-length ruler?


What can I do with .chk files in FOUND.000 folders?


how to check if app is running on android tv or android phone?


Can I play Blu-ray discs directly on a MacBook using an external drive?

How can I play Blu Ray discs with my MacBook?


Find a closed form of the series $\sum_{n=0}^{\infty} n^2x^n$


File readeable on computer, but not on USB


How to count the number of distinct subgroups of $G$?

What is the number of distinct subgroups of the automorphism group of $\mathbf{F}_{3^{100}}$?


Repeatedly clicking the edit button causes chaos


Iterate a Map in order of second operator (integer) [JAVA]


Add custom search engines on Chrome for Android

How can I add a custom search engine to Chrome (beta, stable...)?


Should I use class or struct for wrapping up methods?

When should I use a struct rather than a class in C#?


The door was opened vs The door was open


Image Alpha Background Renders Black when using "Import Images as Planes"


Nginx includes config files not in order?


Reading list and book recommendation on Conformal Field Theory


Correlation of linear combination of random variables

Question on the correlation between two dependent variables


Implication in local noetherian domain of Krull's dimension 1.

$A$ local Noetherian ring with principal maximal ideal implies PIR?


What kind of wall material should be used in wet areas in a bathroom?


sum columns of a data frame depending on the category the observations belong to


Find a sufficient statistic for $\theta$ and show that a UMP test of $H_0: \theta = 6$ against $H_1:\theta <6$ is based on this statistic.


Javascript Function factory code need understanding


ArrayList sorting on the basis of object property

Sort ArrayList of custom Objects by property


How to securely upload and store mdb file from C# client to PHP server?


I was claimed as a dependent in 2018 but not in 2019


Schedule task in Windows Task Scheduler C#


What is the best degradation for CSS :before, :after pseudos in older IE's

:after and :before css pseudo elements hack for IE 7


Should I publish findings not from my field?

Publishing work in areas you're no longer interested in


How to prevent updating of a specific package?


How can I remove Amazon search results from the dash or disable the feature?


Is there a way to disable all notifications on the iPhone in one step?

How to disable all iOS notifications temporarily while actively using/mirroring the device?


how to reserve vector space for class objects?


ArcSDE error: "Maximum number of connections to instance exceeded "

Dealing with ArcSDE connection limit exceeded?


OnClickListener issue on fragment giving error attempt to invoke virtual method

What is a NullPointerException, and how do I fix it?


Replace windows with Ubuntu with ISO burned onto disk?


What is the name of this solitaire card game?


401k withdrawal abroad and state taxation?


arima (0,1,0). How can I interpret it in this case?


Check many keys in dictionary: optimization

How do I check that multiple keys are in a dict in a single pass?


Isomorphism of $so(3,\mathbb{C})$ and $sl(2,\mathbb{C})$ using basis elements

An Explicit Isomorphism Between the Three Dimensional Orthogonal Lie Algebra and the Special Linear Lie Algebra of Dimension $3$


Properties of Object Changed when another Object changed that is the copy of Object in VUEJS

What is the most efficient way to deep clone an object in JavaScript?


How to use two arrays to create an object literal array in JavaScript


Can I buy airfare using one passport (visa required) and then use another (no visa required) to enter the country?


Uppercase the author names shown in citation call-outs generated by \citep

Capital names for author names in citation call-out, normal letters in bibliography


Will it harm my 9v rechargeable battery if the +ve and -ve terminals are connected to each other

Will a battery short out when the terminals are directly connected together or will internal resistance save it?


How to rotate (roll) the 3D view like I'm tilting my head?


Differentiability of the function ${\sin x}\over{ {|x|+\cos x}}$

Multiple choice exercise on $f(x)= \frac {\sin x}{|x|+ \cos x}$


Convert binarystring to int, in C or C++

Converting string of 1s and 0s into binary value


integrate $dx/(a^2 \cos^2x+b^2 \sin^2x)^2$


What sources of randomness can be made with commands in Minecraft?


What force an observer attached to a reference measures?

Force equations for a particle in a non-inertial frame of reference


Bring coca leaves from South America to Europe

Is bringing tea from coca leaves to Europe illegal?


Geometric meaning of Im$\frac{z-z_1}{z-z_2}=0$

Geometric Description Of a Set In The Complex Plane


Why and how do professors go for sabbatical?


How to know what data type an operation will return in C++

Implicit type conversion rules in C++ operators


solving a third-order nonlinear ordinary differential

solving third-order nonlinear ordinary differential equation


How to change colors of texture in lwjgl?


Determining whether a Type is an Anonymous Type

Anonymous Types - Are there any distingushing characteristics?


How can I make a div not larger than its contents?


Null Pointer Exception while calling Fragment method from parent activity

What is a NullPointerException, and how do I fix it?


Is there an upper limit to the number of characters in a question

Knowing Your Limits: What is the maximum length of a question title, post, image and links used?


How to remove the NA from summary of glm?

Interpreting linear regression with NA for estimates


Find pdf for minimum of 4 random variables


Slight adjustment to all document font sizes in LaTeX

How to specify font size less than 10pt (or more than 12pt)?


Definite article with singular or plural noun


C++ - Expected primary expression before '(' token AND missing template arguments before ‘(’ token

Where and why do I have to put the "template" and "typename" keywords?


If $|f(z)| \leq C_1 + C_2 |z|^k$ then $f$ is a polynomial of degree at most $k$

Show that if $|f(z)| \leq M |z|^n$ then $f$ is a polynomial max degree n


jQuery x y document coordinates of DOM object


2D array in python changes the whole row when I only want to change 1 item(Is there a way around it?)

List of lists changes reflected across sublists unexpectedly


Im been trying to solve this but nothings popping out

Give the three numbers that form a geometric sequence.


Installing File Geodatabase (*.gdb) support in QGIS?


Use string substitution to combine array?

How to combine array items with string substitution?


Inserting XML Data in multiple occurence

XML DML for 2008 R2..How to modify nested Elements


Would a backpack or cargo rack be better for commuting?


Intel AX200 working once out of two on 18.04.4 LTS

Wi-fi adapter not found (only the 1st boot after being logged on windows)


Will i be granted ESTA after getting rejected thrice on different nationality?

My ESTA approval if I have previously had a B1 refusal


To find all Ring homomorphisms from $\mathbb Z_m$ to $\mathbb Z_n$

The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$


What is the physical significance of dot & cross product of vectors? Why is division not defined for vectors?


Create Your Own PUBLIC Apt Repository for free?


If $A$ and $B$ are closed subsets of the set of real numbers, then is $A+B$ closed?

Sum of two closed sets in $\mathbb R$ is closed?


The union of $x$ and $y$ axis with subspace topology is not locally euclidean

How to prove a cross is not locally homeomorphic to an euclidean space?


wireless network adapter supported on ubuntu?


Can a player pick and choose quantity of spells on the fly?

Can a spell be prepared once and cast multiple times?


SSIS Error When executing from command line

Executing SSIS 2012 package that has script components from external application


When should one start looking for a postdoc?

How long before PhD graduation should I start applying for post-doc positions?


template class throwing link error in c++

Why can templates only be implemented in the header file?


Arbitrary behaviour of community via upvoting low quality questions and downvoting better questions

Diminishing returns / non-linear reputation from “great” answers


PDO is not inserting symbols correctly in my database


Were women allowed to become Imperial Stormtroopers?


Grammatical explanation of a sentence that begins with "there"

What exactly is the word "there" in an existential construction? And related questions


System freezes completely with Intel Bay Trail


Free And Open Source Software Tools to orthorectify Pleiades imagery

Free GIS software for orthorectification?


How can I remove one of the two Ubuntu operating systems from my computer?

Removing OS from Dual Boot computer, and recovering HD space.


Bluetooth mouse stops working almost everytime I wake my mac from sleep

Bluetooth Issues after Sleep in OS X Yosemite (10.10)


Replace text (with question mark) using regex

How do you use a variable in a regular expression?


Wordpress Export Import Site Navigation Menu


MacOS is showing a badge notification on System Preferences. How can I make it disappear?

How can I disable the red Software Update notification bubble on the System Preferences app in MacOS Mojave (not App Store)?


How to re-index the values of an array in PHP?


Should I submit bank statements when applying for a UK Visa? What do they say about me?


The light signal path through the light clock

Why does a light beam in a moving light clock follows a V shaped path?


How can I click the "Home Folder" on dash to open another Nautilus explorer when there is one already opened?

How do I open more than one Nautilus explorer when there is one already opened?


What is the probability of drawing a $6,7,8$ in a hand of $13$ cards from a deck of $52$?


How to write to files using utl_file in oracle


If $u_{2n}$, $u_{2n+1}$, $u_{3n}$ are convergent sequences then $u_n$ is a convergent sequence

$y_{2n}, y_{2n+1}$ and $y_{3n}$ all converge. What can we say about the sequence $ y_n$?


Why are my villagers attempting to breed (they have the red hearts) but then stop breeding suddenly and gray "angry" particles pop up?


How do I reset a lost administrative password?


A number is a perfect square if and only if it has odd number of positive divisors


I need to print an image at a certain size. What dimensions and resolution should I use?


How to validate regex pattern to check mimetype?

What special characters must be escaped in regular expressions?


How come I am getting a AWT Eventqueue Null pointer exception?

What is a NullPointerException, and how do I fix it?


Does a constantly accelerating charged particle emit EM radiation or not?


Unfortunately Stopped , Error when Call Adapter using Fragment (i Think)


Is there any proof for this simple observation?

Proof: Show there is set of $n+1$ points in $\mathbb{R}^n$ such that distance between any two distinct points is $1$?


Hot network questions should not include locked questions

Questions locked for moderation shouldn't appear on hot questions list


Number of days between two dates in Joda-Time


PDO : sending multiple statements at once without using exec()

PDO support for multiple queries (PDO_MYSQL, PDO_MYSQLND)


How can I level quickly in Skryim to the point that I can get a daedric sword?


Imitate/emulate a big-endian behavior in C?

How to test your code on a machine with big-endian architecture?


CSS: vertical center responsive image within 100% height absolute div

How can I vertically center a "div" element for all browsers using CSS?


Command Solid State Relay using NPN transistor 2N2222

How to control 4 relays with a not chip (7404)


Prove that $\tan 2A = \frac{2\tan A}{1- \tan^2 A} $

use the fact that $\tan 2x=\sin2x \ /\cos2x$ to prove that $\tan 2x=2\tan x/(1-\tan^2x)$


What is a NullPointerException, and how do I fix it?


Basic minted example prints out latex code, not source code

Error when using minted package and -output-directory option


How to replace Windows 8 with Ubuntu on an Acer ES1-711 laptop?

How do I install Ubuntu alongside a pre-installed Windows with UEFI?


Is this expected behavior for With? Should it be replaced by Block?

What are the use cases for different scoping constructs?


How to convert JSON to Javascript array?

Safely turning a JSON string into an object


Best way to center a  on a page vertically and horizontally?

How to center an element horizontally and vertically


Using an OR in an IF statement WinXP Batch Script


No Dual-Boot Option while Installing Ubuntu

How to get GRUB to be the default bootloader instead of Windows Boot Manager on a UEFI laptop?


Why does a = b (mod n) iff a - b is divisible by n?

Why $a\equiv b\pmod n$ implies $a$ and $b$ have equal remainder when divided by $n$?


Writing SQL to check for a role if exist and add member


The chances of you getting a good job are greater than (my chances) of graduating high school. -- grammaticality

When to use an object pronoun or a possessive adjective before a gerund


Removing white space between elements in CSS


Writing a test class for an invocable method that combines the UTC dates of the beginning of the year and the current time


How i can delete Evolution email completely?

How to reset evolution settings to defaults?


jQuery: How to replace a chunk of an array with another array?

How to merge two arrays in JavaScript and de-duplicate items


Edit marked as rejected by Community, but actually rolled into someone else's

Edits that shadow a suggested edit inconsistently reject but include the suggestion


Event binding on dynamically created elements?


Why are the storm troopers in The Force Awakens not the original clones?

What canon evidence is there that Stormtroopers are/are not still clones?


How can I get dramatic shallow DOF with a kit lens?


Decoupling caps near ICs, but how much near?


How do I make the  in the center of the page?

How can I vertically center a "div" element for all browsers using CSS?


Split string into multiple variables in Bash

How do I split a string on a delimiter in Bash?


Combination Problem Involving Integers 1-9 to Reach a Sum of 10

Amount of Number Combinations to Reach a Sum of 10 With Integers 1-9 Using 2 or More Integers


What is the different between who and whom

What’s the rule for using “who” and “whom” correctly?


Could we send a man safely to the Moon in a rocket without knowledge of general relativity?


Falling Speed of earth towards an object?

Don't heavier objects actually fall faster because they exert their own gravity?


Multiple unary operators in an if statement

Using the && operator in an if statement


Why this variation occurs in the usage of definite article before plural uncountable noun 'police'

"police said" - why not "the police said"?


What's the difference between colon ":" and fat arrow "=>"

Is there any difference between the `:key => "value"` and `key: "value"` hash notations?


Commas that are sentence flow-stoppers ... Can I leave them out?


Why is light described by a null geodesic?


Using ACF Pro plugin - How to get alt tags using repeater with Image ID?

How To Retrieve An Image Attachment's Alt Text?


Can a Barbarian stay in rage while polymorphed?


Prove that there are infinitely many primes $p$ such that $\left(\dfrac{p}{5} \right) = 1$

elementary proof that infinite primes quadratic residue modulo $p$


Why can a protected field be access from a class that is not a subtype?

What is the difference between public, protected, package-private and private in Java?


Java exhibiting pass-by-reference behavior

Is Java "pass-by-reference" or "pass-by-value"?


Is there any sequence of functions in $C_c (\mathbb R)$ which converges pointwise only to $e^{-x^2}$

which of the following satement is true? ..


REGEX: how to match each string within double braces in an input string, if it occurs more than once?

Regex to get string between curly braces


create time stamp and compare time by mysql field

MySQL convert date string to Unix timestamp


Is it common to use the phrase “come with” without specifying with whom

Can you grammatically end a sentence with "with"?


In Ubuntu 17.10, how do you get your workspaces on both monitors?

How can I make gnome-shell treat both monitors in the same way?


How to calculate all possible combinations of two alphanumeric characters?

Get the cartesian product of a series of lists?


The user name remains displayed when selecting another site (tablet device only)


Show that $\exists c\in (a,b)$ such that $2f(c)+f'(c)=0$

Rolle's theorem $\beta \cdot f(x)+f'(x)=0$


The source attachment does not contain the source for the file URLClassPath.class

Is there an easy way to attach source in Eclipse?


scrapy doesn't handle requests in priority order

Scrapy not crawling subsequent pages in order


Do multplicatively closed subsets of a ring contains a zero-divisor?

How can it be possible to localize a ring at a set with zero divisors?


How does Software/Code actually communicate with Hardware?


What is the intended way of creating desktop launchers?

How can I create launchers on my desktop?


formatting code after numeric list doesn't display properly

Code block is not properly formatted when placed immediately after a list item


Find out what is causing add/remove hardware sound

What event log should I check for Hardware Changes


What IP addresses and ports are required for firewall exceptions for Stack Overflow sites?

Can we have a list of all the Stack Exchange domains somewhere, for firewall purposes?


What am I doing wrong with my linux commands?

Set the default permission when creating a file


Aligning multiple points to line in QGIS?


Discrepancy between Matlab and Mathematica Fourier parameters

What are the most common pitfalls awaiting new users?


Stuck at "Updating Blizzard Update Agent" when installing World of Warcraft


Upvote not appearing in top bar, possibly linked to Necromancer badge

Why does the reputation dropdown not show this upvote?


Does the Stack Exchange community support using bots on the community?

Present and future of bots on Stack Exchange


Is a planet hot inside because it is still hot from beginning, or continuously heated?


Can't access GeoServer after CORS filter


Sorting lines in Notepad++ without the TextFX plugin


How to send video file via MMS using MFMessageComposeViewController in iOS

Can't send Video to MFMessageComposeViewController


Is it ethical to quit your phD aft 6 months for a better phD offer?

Is it unethical to enroll in a low-ranked institution with the intention of switching to a better one if possible?


Retrieve formatted manual page from command line

Did `man ls > temp.txt`. Output textfile is corrupted


Is Object memory freed when we explicitly call finalize() on it?


Do we know, or at least have a strong argument for the fact that for a given time interval, we can always find a smaller time interval?


Unable to get correct Signature for Twitter Integration

Twitter Integration getting error Failed to validate oauth signature and token


How to solve the following integral by method of residue?


Density can be transferred by a homeomorphism?


Is there any spell-check tool for LaTeX?


What does the "nice" value mean in CPU utilization statistics

What does 'Nice' mean on the processes tab


Mysqli throws "Warning: mysqli_stmt_bind_param() expects parameter 1 to be mysqli_stmt, boolean given"

mysqli_fetch_assoc() expects parameter / Call to a member function bind_param() errors. How to get the actual mysql error and fix it?


How do I enable the "Universe" repository?


How do I get on a Minecraft PE server when it says 'invalid name'?


Websites or advice for Northern Lights Photography (super beginner here)

What tips and advice do you have for photographing the Aurora Borealis?


Usage of brackets for missing or unclear transcription

What is the proper use of [square brackets] in quotes?


Explain Cohen's kappa in a simplest way?


I had a spiral ham delivered, outside in shade for right at 2 hrs. Ham was still cool to touch. Is it still good?

How do I know if food left at room temperature is still safe to eat?


C++11 example of a value and an object in the standard library?


Regression coefficients that flip sign after including other predictors


How did Molly Weasley make sauce out of nothing if Gamp's Law states that this is impossible?

How can McGonagall make sandwiches appear?


What is wrong with this simple running JAVA class?


plus/minus (\pm) sign appears misaligned with unicode-math

Symbol \pm is lower than the number next to it


Calculate the determinant of $A \in Mat_n$

How to evaluate $\det (1+x_iy_j)_{n\times n}$?


Sort the files by size retrieved from a series of folders

Sorting files according to size recursively


How to resolve surprise and "instant actioning" initiating combat


How can I construct a locally unique identifier name?

How to generate random variable names in C++ using macros?


Expression-bodied properties vs. {get; set;}


HTTP/1.1 disable completely client cache

How do we control web page caching, across all browsers?


How do we make sense of this find command?

Understanding the -exec option of `find`


How can I change an element's class with JavaScript?


Understanding the Cartesian product is the set of functions

Cartesian products as sets of all functions.


Has any Stack Exchange site been closed after public beta?


Why are lines missing when using multicolumn?

Why is my table missing a line between columns?


How to delete variable with names starting with certain character(s) in Python IDLE

Enumerate or list all variables in a program of [your favorite language here]


How to find the 'sizeof' (a pointer pointing to an array)?


Regarding Nested functions in Javascript

var functionName = function() {} vs function functionName() {}


How do I avoid text from being pixelated?

Why are Bitmap-Fonts used automatically?


Prove/Disprove $f(x) = x + \frac{x}{{x + 1}}$ is uniformly continuous at $\forall x,y \in [0,\infty )$

Is $f(x)=x+\frac{x}{x+1}$ uniformly continuous on $(0,\infty)$


asp.net, ExecuteReader requires an open and available Connection

ExecuteReader requires an open and available Connection. The connection's current state is Connecting


Why can't i initialize variables in anonymous inner class?

What is a NullPointerException, and how do I fix it?


How to add a decimal point in the units of a concentration?


Find limit of $\lim_{x\to 0}\frac{\sin^{200}(x)}{x^{199}\sin(4x)}$, if it exists


Let G be an abelian group. Suppose $a, b$ are elements of orders $m$ and $n.$ Let $d =\operatorname{lcm}(m, n).$ Show that $(ab)^d = 1$

Order of products of elements in a finite Abelian group


Can length contraction help the moving observer reach a star system 'faster'?

Can I measure a journey time < 100 years on a 100 light year voyage?


WordPress and Ubuntu, www-data and ubuntu for FTP

How to avoid using sudo when working in /var/www?


Proof: A connected metric space which contains more than 1 point is never countable.

Is every connected metric space with at least two points uncountable?


Sed command replace the first occurrence in file

How to use sed to replace only the first occurrence in a file?


How do Xenomorphs grow up without eating anything in a spaceship?

In the Aliens movie, what do the Xenomorphs eat?


And what about the beginners who receive a post ban?

Why can I no longer ask questions when all I did was ask some simple questions?


How do I continously rotate a image 360 degree around is own axis?


Why did Luke have his father's lightsaber?

Should Luke's lightsaber have given away his plan?


How would I generate every possible combination of 2 lists

How to get all possible combinations of a list’s elements?


Spectrum of unbounded Operators + Spectral Theorem


Is it better to use Lagrangian mechanics for all cases?

What is the difference between Newtonian and Lagrangian mechanics in a nutshell?


Moving a 2x2 the length of the solar system

Is it possible for information to be transmitted faster than light by using a rigid pole?


Inability to view MathJax in Questions list in Android App

MathJax does not work on question title on Android app


Can't start apache... (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80


Anyone know a technique for blending these two smoothly? It's a sword handle attaching to guard


Combining secure hashes with insecure hashes?

Determine safety of exercise hash functions


Why JavaScript return me a wrong result in this subtraction of decimals values?


Why my program is failing with null pointer exception

What is a NullPointerException, and how do I fix it?


AWS Aurora with Postgres, ERROR: invalid locale name: "und-x-icu"

Specify ICU collations as `ENCODING`, `LC_COLLATE`, and `LC_CTYPE` in Postgres 10


Solving "DLL load failed: %1 is not a valid Win32 application." for Pygame


Let T be a tree with sub-trees which each set has a vertex in common - hence T has a vertex in all of its sub-trees?

For all $1 \leq i < j \leq k$, the subtrees $T_i$ and $T_j$ have a vertex in common. Show that $T$ has a vertex which is in all of the $T_i$.


Repetition at last instance of file read

Why is “while ( !feof (file) )” always wrong?


How to cast java.util.date to java.sql.date?

How to convert java.util.Date to java.sql.Date?


List of recently awarded badges has no correct spacing

"Recent Badges" list is displayed without margins on "Home" page


Asp.net MVC difference between <%: and <%=

What is the difference between <%: and <%= in ASP.NET MVC?


bcmwl-kernel-source broken on kernel: 5.8.0-34-generic


"the package cache file is corrupted" error

sudo apt get update gives error - The package cache file is corrupted


If I turn the light off in a room why does the light instantly disappear?

Why do light disappears the moment we switch off the source (inside the wooden box)?


Possible combinations of numbers with variables sizes in matlab

Generate all possible combinations of the elements of some vectors (Cartesian product)


I'm working on the Trailhead "using Date and Date/ time formulas" I believe that I have the formula right but I get the error

Formula that returns the current day of the week


Objective-C dot notation with class methods?


If the $Aut(C)$ is trivial for a chain $C$ then $C$ or $C^{op}$ is a well order?

Is this a characterization of well-orders?


Which programs are using my USB flash drive?


After reading the meta I still don't know where to post my question

Which computer science / programming Stack Exchange sites do I post on?


Create my own OSRM for routing machine on leaflet


What resources should I use to learn LaTeX

What are good learning resources for a LaTeX beginner?


I have three cpp file.I want test that template class declaration and definition in different file.but i got failed

Why can templates only be implemented in the header file?


Some areas of label repeat, do not show, or appear offsets in Geoserver

Labels on tiled map sometimes unavailable


What is the weight limit of a large cabin baggage on WizzAir?

What is the limit of cabin baggage on Wizz Air flights?


How can we travel back to time if we go with a speed $>> c$?

How does faster than light travel violate causality?


Get the latest added line of opened file

Get last n lines of a file, similar to tail


What is the largest perimeter rectangle inscribed in a right-angled triangle of 3 and 4 so that one side is over the hypotenuse?

Rectangle inscribed in a right triangle with largest perimeter


Is the wave-particle duality a real duality?


Combining two lists in python2.7.2 as index and value

How do I convert two lists into a dictionary?


Two-way encryption: I need to store passwords that can be retrieved


How to implement GetHashCode() in a C# struct

What is the best algorithm for overriding GetHashCode?


Is there a blackboard bold letter for the set of Boolean numbers?

What is the symbol you'd use for Boolean results?


$\{y(n)\} \in l_1$ if $\sum_{n = 1}^{\infty} x(n) y(n)$ converges for all $x(n) \in c_0$

Convergence of $\sum_{n=1}^{\infty}x_n\overline{y_n}$ for every $(x_n)\in c_0$ implies $\sum_{n=1}^{\infty}|y_n|<\infty$


What is a Question Mark "?" and Colon ":" Operator Used for?

What is the Java ?: operator called and what does it do?


What is the best editor for HTML, CSS etc?

Basic Web Development IDE/Editor like Dreamweaver?


What's the difference between a Long Term Support Release and a Normal Release?


Adding Keywords in URL - Stuffing or Good Technique

Are keywords in URLs good SEO or needlessly redundant?


Linear Algebra Question on Equivalent Systems

Proving that two systems of linear equations are equivalent if they have the same solutions


Polynom to linear factors above the complex numbers

What is the square root of complex number i?


Render scene where camera has background image (Blender 2.8)

Cycles not rendering image or movie clip used as background in the viewport


Best way to start investing, for a young person just starting their career?


How to allow iOS 7 iPhone to sync? "Trust this computer" appears endlessly


Can't connect with localhost or 127.0.0.1 on High Sierra

I can’t connect to localhost on Mac high Sierra


How do I fix ubuntu from booting on a black screen?

My computer boots to a black screen, what options do I have to fix it?


linear unbiased estimator alternative to OLS

Other unbiased estimators than the BLUE (OLS solution) for linear models


I'm trying to insert data but can't understand what error is coming as by adding line to check error still nothing happens in my php code


When is the group of units in $\mathbb{Z}_n$ cyclic?


Link to previous page if exists and is not an external link


In SQL, what’s the difference between count(*) and count('x')?

In SQL, what's the difference between count(column) and count(*)?


Using Laurent series to evaluate integral

Evaluating $\int_0^{2 \pi} e^{\cos x} \cos (nx - \sin x) \,dx$ using complex analysis


What is the magnetic field of a radially moving current?

Why is the magnetic field of a spherically symmetric current zero?


how to overload << operator in c++ ussing class and objects

How to properly overload the << operator for an ostream?


Given n coins, some of which are heavier, find the number of heavy coins?


Is there any way to install linux on a T2 chipset equiped laptop?

How can you get any version of Linux to see the 2018 MacBook Pro SSD?


Uncountable basis of vector space of infinite sequences in R

Vector space of infinite sequences in $\Bbb R$


Android Load Cache Only is not working. Show WebView offline


How to make \left, \right pairs of delimiter work over multiple lines?


What is the scope of variables in JavaScript?


Is there a word or phrase that means "both literally and figuratively"?

Word or phrase for literally and figuratively?


Standard location for holding software source files


How does the Higgs Boson gain mass itself?


Can I use "First, ... Secondly, ... Finally, ... " like this ?

Does *first of all* always go with *second of all*?


Bind click function not working on ajax content refresh

Event binding on dynamically created elements?


Can a computationally unbounded adversary break any public-key encryption scheme?


Why are Hermione's efforts to free the House-elves so incompetent?

Could Hermione really free the Hogwarts house-elves with her knitted hats?


Is it proper and/or smart to independently ground an older 3 prong dryer outlet and upgrade it to 4 prong?

House wiring and grounding. How do you retrofit an old house and ground it?


Built-in (or recommended safe) way to post a link to an image inside a comment?

Is it possible to add images to comments?


g++ "undefined reference to" some function

What is an undefined reference/unresolved external symbol error and how do I fix it?


How do I link libcurl to my c++ program in linux?


Where can I find the META-INF file for 1.6.4?

What do I do if I don't have a META-INF folder or minecraft.jar?


Redirecting standard output to a file containing the pid of the logging process


Canadian parent gifting adult child in the US

I am a Canadian resident who wants to gift my Adult US child CAD$175K. What are the tax implications?


AES-CBC with zero IV and a unique first block

Is CBC mode with a fixed IV secure, if a counter is prepended to the plaintext?


Reading from a text file that shows the last line details twice in the output


Counting occurrence of char character in Array list

How do I count the number of occurrences of a char in a String?


Are there any utilities to know where a file is physically present in the hdd?

View physical location of a file/directory on a hard disk


How can I get useful error messages in PHP?


How do I integrate the following? $\int{\frac{(1+x^{2})\mathrm dx}{(1-x^{2})\sqrt{1+x^{4}}}}$


The function of "young"in these sentence


How is it possible that double inequality succeeds on two equal doubles?


Physical reason why the wavelength defines the minimum sized opening an electromagnetic wave can pass through?


Trying to rent car in USA for more than 30 days

Car rental vs. buying a car for 1 month, when visiting the USA?


OSX Android studio's gradle cannot read .bash_profile environment variable


Why do I get a converging result when pressing cosine multiple times on a calculator?


How can I make environment variables "exported" in a shell script stick around?


match noisy GPS data to closest linestring in road network

How to find nearest line from point using PostGIS?


mod_rewrite: remove trailing slash (only one!)


Does a Grapple or Shove count as an attack for the Mobile feat?


Kernel Task is using 1000% of The CPU on macOS Catalina


Converting CDF file to NetCDF file to use in ArcMap?


Prove the following trigonometric identity without a calculator involved


No line break with colored git branch in bash prompt

Reverse-search in CLI: messed up output afterwards


What is a simple way to prove that the point-wise limit of the sequence $\{kx^k\}_{k\in \Bbb N}$ is $0$.

Sequence Limit: $\lim\limits_{n \rightarrow \infty}{n\,x^n}$


str_replace characters with 2 other characters

Search and replace multiple values with multiple/different values in PHP5?


javascript named function expressions - scope accessibility

var functionName = function() {} vs function functionName() {}


MySQL - Batch Delete vs Individual Delete


Chrome extension Content Script not loaded until page is refreshed


How to remove 'http://' from a URL in JavaScript

taking off the http or https off a javascript string


Can a creature with hexproof be targeted by spells that target all creatures?

Which spells or abilities are affected by things that care about targeting?


The JFrame doesn't receive external var updates

What is a NullPointerException, and how do I fix it?


Indefinite INTEGRAL fraction ( irrational )


What am I trying to mine, but can't, in Pre-Hardmode?

What is this ore, and why can't I mine it?


What is the difference between aggregation, composition and dependency?

What is the difference between association, aggregation and composition?


Explanation of the meeting between Gus and Don Eladio

S04E08 (Hermanos): Why is Gus allowed to live?


Keyboard key stuck or not being recognized; how to fix


Do I have to worry about copyright issues?

Users are calling me a plagiarist. What do I do?


How do I handle information in Investigations without "bottlenecking" clues?

How to make skill use on investigations "important" but failure not derail the plot?


What is the appropriate place to ask for advice on which technology or plugin to use for a specific purpose?


What is the difference between using an ND filter versus 2 polarizers?


Question from the British Mathematical Olympiad

A 5x5 board has 25 cells.The numbers $\{1,2,3,4,5\}$ are written on every row,every column and the two main diagonals.


Why is my Ubuntu 12.04 not booting after GRUB?

My computer boots to a black screen, what options do I have to fix it?


java - invalid method declaration; return type required

Java error - "invalid method declaration; return type required"


I can not snap this two object precisely with direct selection tool also .What can I do?

How do I stop Illustrator from snapping to pixel increments?


Fire not showing up when I make the background transparent

Rendering fire animations with transparent background


How do you rotate a two dimensional array?


Why are my US Google rankings so much worse than UK rankings and what can I do about it?

What are the best ways to improve a site's position in Google?


How to compress jpeg images for Google Page Speed Insights?

Google Pagespeed: How to satisfy the new image compression rules?


How do I show that $\mathbb{Q}$ and $\mathbb{Q}\times\mathbb{Q}$ are not group isomorphic?

Are the groups $\mathbb{C}$ and $\mathbb{R}$ isomorphic?


What is the dimension of the space of commutators?

Determining the dimension of span$\{AB-BA : A,B \in M_{n \times n}(\mathbb R) \}$


Java Unable to start activity NullPointerException similar questions don't solve this

What is a NullPointerException, and how do I fix it?


Urldecoding string with Danish characters on Linux