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How does PHP 'foreach' actually work?
Let me prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach ".
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How do I run all Python unit tests in a directory?
...th have failed. I will show the two methods, and I hope someone out there knows how to actually do this correctly.
15 Answe...
How can I reverse a NSArray in Objective-C?
... danielpunkass's solution. I used it thinking it was a great shortcut, but now I've just spent 3 hours trying to figure out why my A* algorithm was broken. It's because it returns the wrong set!
– Georg Schölly
Mar 12 '10 at 6:23
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How do you fix a bad merge, and replay your good commits onto a fixed merge?
... merge) to my repository several commits ago, without me noticing it until now. I want to completely delete the file from the repository history.
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Homebrew install specific version of formula?
...Library/Formula/postgresql.rb
$ brew install postgresql
# … installing
Now that the older postgresql version is installed, we can re-install the latest formula in order to keep our repository clean:
$ git checkout -- Library/Formula/postgresql.rb
brew switch is your friend to change between t...
When is localStorage cleared?
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localStorage is also known as Web Storage, HTML5 Storage, and DOM Storage (these all mean the same thing).
localStorage is similar to sessionStorage, except that data stored in localStorage has no expiration time, while data stored in sessionStor...
catch all unhandled exceptions in ASP.NET Web Api
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This is now possible with WebAPI 2.1 (see the What's New):
Create one or more implementations of IExceptionLogger. For example:
public class TraceExceptionLogger : ExceptionLogger
{
public override void Log(ExceptionLoggerConte...
jQuery: Get selected element tag name
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As of jQuery 1.6 you should now call prop:
$target.prop("tagName")
See http://api.jquery.com/prop/
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How to find memory leak in a C++ code/project?
...house a string.
delete [] str; // Clear those 30 bytes and make str point nowhere.
2
Reallocate memory only if you've deleted. In the code below, str acquires a new address with the second allocation. The first address is lost irretrievably, and so are the 30 bytes that it pointed to. Now they'r...
Python group by
...AT'), ('5594916', 'ETH'), ('1550003', 'ETH')]
input.sort(key=sortkeyfn)
Now input looks like:
[('5238761', 'ETH'), ('5349618', 'ETH'), ('962142', 'ETH'), ('7795297', 'ETH'),
('7341464', 'ETH'), ('5594916', 'ETH'), ('1550003', 'ETH'), ('11013331', 'KAT'),
('9843236', 'KAT'), ('9085267', 'NOT'),...