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Convert to absolute value in Objective-C
...s(double), or fabsl(long double).
Those functions are all part of the C standard library, and so are present both in Objective-C and plain C (and are generally available in C++ programs too.)
(Alas, there is no habs(short) function. Or scabs(signed char) for that matter...)
Apple's and GNU's Ob...
What are the differences between vector and list data types in R?
What are the main differences between vector and list data types in R? What are the advantages or disadvantages of using (or not) these two data types?
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How do I resize an image using PIL and maintain its aspect ratio?
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Like it says, the example was from the pil documentation, and that example (still) doesn't use the antialias flag. Since it's probably what most people would want, though, I added it.
– gnud
Dec 8 '11 at 8:29
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Rails 3 datatypes?
...ed in rails 3? (such as text, string, integer, float, date, etc.?) I keep randomly learning about new ones, but I'd love to have a list I could easily refer to.
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What is the difference between min SDK version/target SDK version vs. compile SDK version?
What are the differences between "min sdk version/target sdk version" and "compile sdk version"? I know what min and target sdk means, but what does compile sdk version mean?
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Push to GitHub without a password using ssh-key
I generated an SSH key pair without a password and added the public key to GitHub.
6 Answers
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Does a const reference class member prolong the life of a temporary?
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Only local const references prolong the lifespan.
The standard specifies such behavior in §8.5.3/5, [dcl.init.ref], the section on initializers of reference declarations. The reference in your example is bound to the constructor's argument n, and becomes invalid when the object n...
std::next_permutation Implementation Explanation
...tation was implemented so I extracted the the gnu libstdc++ 4.7 version and sanitized the identifiers and formatting to produce the following demo...
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git diff file against its last change
...ble to get git to produce a diff between a specific file as it exists now, and as it existed before the last commit that changed it?
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Does MySQL included with MAMP not include a config file?
...t it more "nicely," though it's a bit of a pain for people used to the command line. Just go File->Edit Template->MySQL my.cnf, and change whatever settings you need. More info on both MAMP and MAMP pro here.
– Chris Krycho
Apr 6 '12 at 18:46
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