How do I lowercase a string in Python?
Is there a way to convert a string to lowercase? ``` "Kilometers" → "kilometers" ```
.prop() vs .attr()
So [jQuery 1.6](http://api.jquery.com/category/version/1.6/) has the new function [prop()](http://api.jquery.com/prop/). ``` $(selector).click(function(){ //instead of: this.getAttribute('sty...
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- 25 Apr at 18:2
What is The Rule of Three?
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- 26 May at 12:7
How do I parse command line arguments in Bash?
Say, I have a script that gets called with this line: ``` ./myscript -vfd ./foo/bar/someFile -o /fizz/someOtherFile ``` or this one: ``` ./myscript -v -f -d -o /fizz/someOtherFile ./foo/bar/someFile ...
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- 23 Jul at 15:31
Class (static) variables and methods
How do I create class (i.e. [static](https://en.wikipedia.org/wiki/Method_(computer_programming)#Static_methods)) variables or methods in Python?
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- 3 Dec at 07:36
How to make a great R reproducible example
When discussing performance with colleagues, teaching, sending a bug report or searching for guidance on mailing lists and here on Stack Overflow, a [reproducible example](https://stackoverflow.com/he...
Branch from a previous commit using Git
If I have `N` commits, how do I branch from the `N-3` commit?
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- 25 Jul at 02:37
Make .gitignore ignore everything except a few files
I understand that a `.gitignore` file cloaks specified files from Git's version control. How do I tell `.gitignore` to ignore everything except the files I'm tracking with Git? Something like: ``` # I...
How do I chop/slice/trim off last character in string using Javascript?
I have a string, `12345.00`, and I would like it to return `12345.0`. I have looked at `trim`, but it looks like it is only trimming whitespace and `slice` which I don't see how this would work. Any ...
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- 13 Oct at 15:32
How can I save username and password in Git?
I want to use a push and pull automatically in [Git Extensions](http://gitextensions.github.io/), [Sourcetree](https://en.wikipedia.org/wiki/Atlassian#Acquisitions_and_product_announcements) or any ot...
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- 5 Sep at 10:28
Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose `a1`, `b1`, `c1`, and `d1` point to heap memory, and my numerical code has the following core loop. ``` const int n = 100000; for (int j = 0; j < n; j++) { a1[j] += b1[j]; c1[j] += d1...
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- 6 Nov at 14:38
Generate random number between two numbers in JavaScript
Is there a way to generate a in a with JavaScript ? : a specified range from were the random number could be either .
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- 30 Apr at 08:13
What's the difference between SCSS and Sass?
From what I've been reading, Sass is a language that makes CSS more powerful with variable and math support. What's the difference with SCSS? Is it supposed to be the same language? Similar? Differe...
Difference between decimal, float and double in .NET?
What is the difference between `decimal`, `float` and `double` in .NET? When would someone use one of these?
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- 11 Jul at 18:33
Get the size of the screen, current web page and browser window
How can I get `windowWidth`, `windowHeight`, `pageWidth`, `pageHeight`, `screenWidth`, `screenHeight`, `pageX`, `pageY`, `screenX`, `screenY` which will work in all major browsers? , but it is too complicated. Can somebody explain it to me in simple ...
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- 18 Sep at 03:0
Indent multiple lines quickly in vi
It should be trivial, and it might even be in the help, but I can't figure out how to navigate it. How do I indent multiple lines quickly in vi?
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- 29 Oct at 09:54
$(document).ready equivalent without jQuery
I have a script that uses `$(document).ready`, but it doesn't use anything else from jQuery. I'd like to lighten it up by removing the jQuery dependency. How can I implement my own `$(document).ready...
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- 20 Aug at 20:39
Should 'using' directives be inside or outside the namespace in C#?
I have been running [StyleCop](http://en.wikipedia.org/wiki/StyleCop) over some C# code, and it keeps reporting that my `using` directives should be inside the namespace. Is there a technical reason ...
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- 6 Feb at 14:3
How to print without a newline or space
Consider these examples using `print` in Python: ``` >>> for i in range(4): print('.') . . . . >>> print('.', '.', '.', '.') . . . . ``` Either a newline or a space is added between each value. How c...
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- 1 Jan at 23:46
Finding duplicate values in a SQL table
It's easy to find duplicates with one field: ``` SELECT email, COUNT(email) FROM users GROUP BY email HAVING COUNT(email) > 1 ``` So if we have a table ``` ID NAME EMAIL 1 John asd@asd.com ...
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- 28 Sep at 16:11
How do I get a consistent byte representation of strings in C# without manually specifying an encoding?
How do I convert a `string` to a `byte[]` in .NET (C#) without manually specifying a specific encoding? I'm going to encrypt the string. I can encrypt it without converting, but I'd still like to kno...
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- 26 Feb at 22:22
How do I recover a dropped stash in Git?
I frequently use `git stash` and `git stash pop` to save and restore changes in my working tree. Yesterday, I had some changes in my working tree that I had stashed and popped, and then I made more ch...
How do I generate a random integer in C#?
How do I generate a random integer in C#?
What is a non-capturing group in regular expressions?
How are non-capturing groups, i.e., `(?:)`, used in regular expressions and what are they good for?
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- 5 Jan at 21:38
How to concatenate text from multiple rows into a single text string in SQL Server
Consider a database table holding names, with three rows: ``` Peter Paul Mary ``` Is there an easy way to turn this into a single string of `Peter, Paul, Mary`?
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- 20 Aug at 16:15
"implements Runnable" vs "extends Thread" in Java
From what time I've spent with threads in `Java`, I've found these two ways to write threads: With `Runnable` ``` public class MyRunnable implements Runnable { public void run() { //Code ...
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- 17 Aug at 09:22
Importing files from different folder
I have this folder structure: ``` application ├── app │ └── folder │ └── file.py └── app2 └── some_folder └── some_file.py ``` How can I import a function from `file.py`, from wit...
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- 28 Aug at 02:26
PostgreSQL: Show tables in PostgreSQL
What's the equivalent to `show tables` (from MySQL) in PostgreSQL?
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- 31 May at 14:55
Iterate through object properties
``` var obj = { name: "Simon", age: "20", clothing: { style: "simple", hipster: false } } for(var propt in obj){ console.log(propt + ': ' + obj[propt]); } ``` H...
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- 13 Mar at 10:58
What is the copy-and-swap idiom?
What is the copy-and-swap idiom and when should it be used? What problems does it solve? Does it change for C++11? Related: - [What are your favorite C++ Coding Style idioms: Copy-swap](https://stacko...
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- 4 Jul at 21:56
Showing which files have changed between two revisions
I want to merge two branches that have been separated for a while and wanted to know which files have been modified. Came across this link: [http://linux.yyz.us/git-howto.html](https://web.archive.org...
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- 28 Dec at 17:17
How do I set a variable to the output of a command in Bash?
I have a pretty simple script that is something like the following: ``` #!/bin/bash VAR1="$1" MOREF='sudo run command against $VAR1 | grep name | cut -c7-' echo $MOREF ``` When I run this script ...
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- 11 Apr at 11:54
How do I escape curly-brace ({}) characters in a string while using .format (or an f-string)?
Non-working example: ``` print(" \{ Hello \} {0} ".format(42)) ``` Desired output: ``` {Hello} 42 ```
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- 22 Jan at 04:25
JavaScript check if variable exists (is defined/initialized)
Which method of checking if a variable has been initialized is better/correct? (Assuming the variable could hold anything (string, int, object, function, etc.)) ``` if (elem) { // or !elem ``` or ```...
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- 12 Apr at 01:7
How do you parse and process HTML/XML in PHP?
How can one parse HTML/XML and extract information from it?
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- 24 Dec at 15:45
What is a JavaBean exactly?
I understood, I think, that a "Bean" is a Java-class with properties and getters/setters. As much as I understand, it is the equivalent of a C `struct`. Is that true? Also, is there a real differenc...
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- 12 Oct at 12:25
Vim clear last search highlighting
After doing a search in Vim, I get all the occurrences highlighted. How can I disable that? I now do another search for something gibberish that can't be found. Is there a way to just temporarily di...
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- 8 Jun at 20:42
What is the best way to give a C# auto-property an initial value?
How do you give a C# auto-property an initial value? I either use the constructor, or revert to the old syntax. ``` class Person { public Person() { Name = "Initial Name"; } ...
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- 3 Mar at 11:48
Get int value from enum in C#
I have a class called `Questions` (plural). In this class there is an enum called `Question` (singular) which looks like this. ``` public enum Question { Role = 2, ProjectFunding = 3, Tot...
How to write a switch statement in Ruby
How do I write a `switch` statement in Ruby?
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- 26 Nov at 20:20
Limiting floats to two decimal points
I want `a` to be rounded to . I tried using [round](https://docs.python.org/2/library/functions.html#round), but I get: ``` >>> a 13.949999999999999 >>> round(a, 2) 13.949999999999999 ``` --- [How...
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- 23 Sep at 14:4
Are double and single quotes interchangeable in JavaScript?
Consider the following two alternatives: - `console.log("double");`- `console.log('single');` The former uses double quotes around the string, whereas the latter uses single quotes around the string. ...
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- 27 Jan at 05:37
How to convert a string to an integer in JavaScript
How do I convert a string to an integer in JavaScript?
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- 9 Nov at 01:5
How to exit in Node.js
What is the command that is used to exit? (i.e terminate the Node.js process)
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- 14 Aug at 03:9
Remove duplicate values from JS array
I have a very simple JavaScript array that may or may not contain duplicates. ``` var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"]; ``` I need to remove the duplicates and put the un...
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- 27 Dec at 00:58
What is 'Context' on Android?
In Android programming, what exactly is a `Context` class and what is it used for? I read about it on the [developer site](https://d.android.com/reference/android/content/Context), but I am unable to...
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- 4 Nov at 11:11
How do I get the number of elements in a list (length of a list) in Python?
How do I get the number of elements in the list `items`? ``` items = ["apple", "orange", "banana"] # There are 3 items. ```
Interfaces vs Types in TypeScript
What is the difference between these statements (`interface` vs `type`) in TypeScript? ``` interface X { a: number b: string } type X = { a: number b: string }; ```
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- 14 Sep at 11:1