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What's the difference between using CGFloat and float?

I tend to use CGFloat all over the place, but I wonder if I get a senseless "performance hit" with this. CGFloat seems to be something "heavier" than float, right? At which points should I use CGFloat, and what makes really the difference? ...
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How can you determine a point is between two other points on a line segment?

Let's say you have a two dimensional plane with 2 points (called a and b) on it represented by an x integer and a y integer for each point. ...
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Exploitable PHP functions

...purpose isn't to list functions that should be blacklisted or otherwise disallowed. Rather, I'd like to have a grep -able list of red-flag keywords handy when searching a compromised server for back-doors. ...
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Auto-center map with multiple markers in Google Maps API v3

... @MultiformeIngegno Calling it right after fitBounds worked for me in a brief test; let me know if you're still having trouble. – metadept Mar 30 '13 at 15:35 ...
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Can I change the checkbox size using CSS?

...ers no solutions in many cases (no solution to firefox on xp? no chrome at all?), is outdated and only contains a link and a comment of not much value. – nurettin Feb 13 '13 at 15:34 ...
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python exception message capturing

...work, I get syntax error, what is the proper way of doing this for logging all kind of exceptions to a file 11 Answers ...
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Disable button in jQuery

... Here is a small fiddle I created. Please let me what I'm doing wrong. jsfiddle.net/2Nfu4/3 – user2047817 Feb 28 '13 at 17:48 ...
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What is Bit Masking?

... the b to indicate binary literal is not supported by all compilers, correct? – Ungeheuer May 8 '17 at 23:37 ...
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How do I copy items from list to list without foreach?

... It works with all types, as long as lstStudentClass is an IEnumerable<StudentClass>, it will work. If you experience otherwise you need to provide more information. – Lasse V. Karlsen Apr 3 '15 ...
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How to initialize a private static const map in C++?

... int>’ as ‘this’ argument of ‘std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = int; _Tp = int; _Compare = std::less<int>; _Alloc = std::allocator<std::pair<const int, int>...