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Check if a given key already exists in a dictionary
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I usually just use get if I'm going to be pulling the item out of the dictionary anyway. No sense in using in and pulling the item out of the dictionary.
– Jason Baker
Oct 21 '09 at 19:12
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Toggle input disabled attribute using jQuery
...lity disabled should set by the value disabled or get removed!
Here is a small plugin that I've just made:
(function($) {
$.fn.toggleDisabled = function() {
return this.each(function() {
var $this = $(this);
if ($this.attr('disabled')) $this.removeAttr('disable...
Why should I use the keyword “final” on a method parameter in Java?
I can't understand where the final keyword is really handy when it is used on method parameters.
12 Answers
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How do I revert master branch to a tag in git?
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This way all the branches will be pushed with force. You may want to try git push --force origin master
– danza
Apr 11 '13 at 7:42
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Spring Boot Rest Controller how to return different HTTP status codes?
...s you can use. Quite good way is to use exceptions and class for handling called @ControllerAdvice:
@ControllerAdvice
class GlobalControllerExceptionHandler {
@ResponseStatus(HttpStatus.CONFLICT) // 409
@ExceptionHandler(DataIntegrityViolationException.class)
public void handleConflict...
Node.js version on the command line? (not the REPL)
...t on the question, but let me repeat it here: node -h or node --help shows all supported command-line options.
– mklement0
Mar 8 '15 at 3:38
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Extract a substring from a string in Ruby using a regular expression
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This is the fastest of all the methods presented, but even the slowest method takes only 4.5 microseconds on my machine. I do not care to speculate why this method is faster. In performance, speculation is useless. Only measurement counts.
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Difference between $(document.body) and $('body')
...tatement is not completely correct. They may refer to the same element. Usually even. But not always :). See my answer below.
– jvenema
Feb 28 '18 at 22:28
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How can I get my webapp's base URL in ASP.NET MVC?
...T Core / MVC 6:
ASP.NET Core makes this process a bit more painful, especially if you are deep in your code. You have 2 options to get at the HttpContext
1) Pass it in from your controller:
var model = new MyClass(HttpContext);
then in model:
private HttpContext currentContext;
public MyClass...
Creating temporary files in bash
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The mktemp(1) man page explains it fairly well:
Traditionally, many shell scripts take the name of the program with
the pid as a suffix and use that as a temporary file name. This kind
of naming scheme is predictable and the race condition it creates is
easy for an attacker t...