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What is external linkage and internal linkage?
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When you write an implementation file (.cpp, .cxx, etc) your compiler generates a translation unit. This is the source file from your implementation plus all the headers you #included in it.
Internal linkage refers to everything only ...
How does PHP 'foreach' actually work?
...e 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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Tools for JPEG optimization? [closed]
...ate into our build environment? For PNGs I'm currently using PNGOUT , and it generally saves around 40% bandwidth/image size.
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What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
When should certain image file types be used when building websites or interfaces, etc?
13 Answers
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STL or Qt containers?
...xclusively and converting to/from the Qt equivalents, but I have already switched to QString and I find that I'm using Qt's containers more and more.
When it comes to strings, QString offers much more complete functionality compared to std::basic_string and it is
completely Unicode aware. It also o...
Is it valid to define functions in JSON results?
Part of a website's JSON response had this (... added for context):
11 Answers
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Do I need Content-Type: application/octet-stream for file download?
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No.
The content-type should be whatever it is known to be, if you know it. application/octet-stream is defined as "arbitrary binary data" in RFC 2046, and there's a definite overlap here of it being appropriate for entities whose sole intended purpose is to be save...
Why should I capitalize my SQL keywords? [duplicate]
...tring of uppercase characters. Is some old/popular flavor of SQL case-sensitive or something?
16 Answers
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How to shorten my conditional statements
I have a very long conditional statement like the following:
15 Answers
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C++ valarray vs. vector
... pointers so the compiler can make assumptions about the code and optimise it better. (The main reason that Fortran is so fast is that there is no pointer type so there can be no pointer aliasing.)
Valarrays also have classes which allow you to slice them up in a reasonably easy way although that p...