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How do I create a category in Xcode 6 or higher?
...; File
Select Objective-C file under Sources in iOS or Mac OS respectively and Click Next
Now under File Type: choose either Category, Protocol, or Extension
PS. Under File Name: whatever you type here will be either the Category, Protocol, or Extension Name.
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What is Data URI support like in major email client software?
Data URIs are a standard way to embed images and other binary data in HTML, and browser support is well documented on the web. (IE8 was the first version of IE to support Data URI, with a max 32 KB size per URI; other major browsers have supported it even longer.)
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What is the Windows version of cron? [closed]
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For the original question, asking about Windows XP (and Windows 7): Windows Task Scheduler
For command-line usage, you can schedule with the AT command.
For newer Microsoft OS versions, Windows Server 2012 / Windows 8, look at the schtasks command line utility.
If using Powe...
Should a function have only one return statement?
... Agreed. Although having multiple exit point can get out of hand, I definately think it's better than putting your entire function in an IF block. Use return as often as it makes sense to keep your code readable.
– Joshua Carmody
Sep 19 '08 at 20:...
Difference between this and self in JavaScript
... // true
If you're using a function that is executed in the global scope and is not in strict mode, this defaults to window, and therefore
function foo() {
console.log(
window.self === window, // is self window?
window.self === this, // is self this?
this === window ...
HTML table headers always visible at top of window when viewing a large table
...tThead (demos available) which is very cool, can work with DataTables too, and can even work inside an overflow: auto container.
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Write applications in C or C++ for Android? [closed]
I'm trying to develop/port a game to Android, but it's in C, and Android supports Java, but I'm sure there must be a way to get a C app on there, anyone knows of a way to accomplish this?
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How to grep Git commit diffs or contents for a certain word?
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To illustrate the difference between -S<regex> --pickaxe-regex and -G<regex>, consider a commit with the following diff in the same file:
+ return !regexec(regexp, two->ptr, 1, &regmatch, 0);
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- hit = !regexec(regexp, mf2.ptr, 1, &regmatch, 0);
While git ...
LINQ: Not Any vs All Don't
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Implementation of All according to ILSpy (as in I actually went and looked, rather than the "well, that method works a bit like ..." I might do if we were discussing the theory rather than the impact).
public static bool All<TSource>(this IEnumerable<TSource> source, Func<...
Easy way to prevent Heroku idling?
... or less the same solution as Jesse but maybe more integrated to Heroku... And with a few perks (performance monitoring is just great).
Note: to all those saying it doesn't work: the important part in my answer is "availability monitor". Just installing the addon won't help. You also need to s...