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What is a postback?

I'm making my way into web development and have seen the word postback thrown around. Coming from a non-web based background, what does a new web developer have to know about postbacks? (i.e. what are they and when do they arise?) ...
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How to convert date to timestamp in PHP?

... This method works on both Windows and Unix and is time-zone aware, which is probably what you want if you work with dates. If you don't care about timezone, or want to use the time zone your server uses: $d = DateTime::createFromFormat(...
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What's the difference between $evalAsync and $timeout in AngularJS?

I've been using AngularJS for a little while now, and have found the need to use $timeout every once in a while (Seems to usually be to init a jQuery plugin). ...
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How to use NSCache

Can someone give an example on how to use NSCache to cache a string? Or anyone has a link to a good explanation? I can't seem to find any.. ...
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What does yield mean in PHP?

... What is yield? The yield keyword returns data from a generator function: The heart of a generator function is the yield keyword. In its simplest form, a yield statement looks much like a return statement, except that instead of stopping execution of ...
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Are there any smart cases of runtime code modification?

Can you think of any legitimate (smart) uses for runtime code modification (program modifying it's own code at runtime)? 1...
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Why shouldn't I use “Hungarian Notation”?

I know what Hungarian refers to - giving information about a variable, parameter, or type as a prefix to its name. Everyone seems to be rabidly against it, even though in some cases it seems to be a good idea. If I feel that useful information is being imparted, why shouldn't I put it right there wh...
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How to programmatically get iOS status bar height

I know that currently the status bar (with the time, battery, and network connection) at the top of the iPhone/iPad is 20 pixels for non-retina screens and 40 pixels for retina screens, but to future proof my app I would like to be able to determine this without hard coding values. Is it possible to...
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How to Correctly handle Weak Self in Swift Blocks with Arguments

... Apple called blocks "closures" in their very first document for a C language extension. (Blocks or closures are an extension of C at the very first. Only MM is related to Objective-C.) Even I prefer the term "closure", too, because "blocks" in C is related to compound statements very o...
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CSS: Animation vs. Transition

So, I understand how to perform both CSS3 transitions and animations . What is not clear, and I've googled, is when to use which. ...