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Favicon dimensions? [duplicate]

... Short answer The favicon is supposed to be a set of 16x16, 32x32 and 48x48 pictures in ICO format. ICO format is different than PNG. Non-square pictures are not supported. To generate the favicon, for many reasons explained below, I advise you to use this favicon generator. Full disclosure...
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How to fix “Headers already sent” error in PHP

...ically Previous error messages or notices Intentional: print, echo and other functions producing output Raw <html> sections prior <?php code. Why does it happen? To understand why headers must be sent before output it's necessary to look at a typical HTTP response. PHP scripts ...
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Why aren't variable-length arrays part of the C++ standard?

... space available, isn't good. The argument is, if you know the size beforehand, you can use a static array. And if you don't know the size beforehand, you will write unsafe code. C99 VLAs could provide a small benefit of being able to create small arrays without wasting space or calling constructo...
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Does the use of the “Async” suffix in a method name depend on whether the 'async' modifier is used?

... is ambiguous even from Microsoft documentation: In Visual Studio 2012 and the .NET Framework 4.5, any method that is attributed with the async keyword (Async in Visual Basic) is considered an asynchronous method, and the C# and Visual Basic compilers perform the necessary transformations ...
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Why does C# disallow readonly local variables?

...into the CLR/CLI initonly opcode. This flag can only be applied to fields and has no meaning for a local. In fact, applying it to a local will likely produce unverifiable code. This doesn't mean that C# couldn't do this. But it would give two different meanings to the same language construct. T...
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MySQL indexes - what are the best practices?

...or selecting using a WHERE clause but sometimes it doesn't seem so black and white. 7 Answers ...
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How can I strip first and last double quotes?

... If the quotes you want to strip are always going to be "first and last" as you said, then you could simply use: string = string[1:-1] share | improve this answer | ...
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Can a class member function template be virtual?

...would need to call a templatized virtual function, compilation is all done and the compiler cannot generate the appropriate instance anymore. Therefore you cannot have virtual member function templates. However, there are a few powerful and interesting techniques stemming from combining polymorphi...
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Quick-and-dirty way to ensure only one instance of a shell script is running at a time

What's a quick-and-dirty way to make sure that only one instance of a shell script is running at a given time? 40 Answers ...
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What is “lifting” in Haskell?

I don't understand what "lifting" is. Should I first understand monads before understanding what a "lift" is? (I'm completely ignorant about monads, too :) Or can someone explain it to me with simple words? ...