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MIN and MAX in C

...afety bonus too) in a GCC statement expression: #define max(a,b) \ ({ __typeof__ (a) _a = (a); \ __typeof__ (b) _b = (b); \ _a > _b ? _a : _b; }) Everyone says "oh I know about double evaluation, it's no problem" and a few months down the road, you'll be debugging the silliest ...
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How do I get the opposite (negation) of a Boolean in Python?

... function There are also two functions in the operator module operator.not_ and it's alias operator.__not__ in case you need it as function instead of as operator: >>> import operator >>> operator.not_(False) True >>> operator.not_(True) False These can be useful if yo...
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Python function overloading

...','y','z']) >>> @dispatch(Sprite, Point, Vector, int) ... def add_bullet(sprite, start, direction, speed): ... print("Called Version 1") ... >>> @dispatch(Sprite, Point, Point, int, float) ... def add_bullet(sprite, start, headto, speed, acceleration): ... print("Called ve...
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How to find out what type of a Mat object is with Mat::type() in OpenCV

...st. string type2str(int type) { string r; uchar depth = type & CV_MAT_DEPTH_MASK; uchar chans = 1 + (type >> CV_CN_SHIFT); switch ( depth ) { case CV_8U: r = "8U"; break; case CV_8S: r = "8S"; break; case CV_16U: r = "16U"; break; case CV_16S: r = "16S"; break;...
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How to work with complex numbers in C?

...a standard c99 type (under the hood on GCC, it is actually an alias to the _Complex type). – Snaipe Apr 12 '15 at 8:50 ...
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How to remove an element from a list by index

...ook at svn.python.org/projects/python/trunk/Objects/listobject.c how PyList_GetItem() essentially returns ((PyListObject *)op) -> ob_item[i]; - the ith element of an array. – glglgl Sep 9 '13 at 7:53 ...
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How do I base64 encode (decode) in C?

... #include <stdint.h> #include <stdlib.h> static char encoding_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', ...
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List all base classes in a hierarchy of given class?

...gt; >>> import inspect >>> inspect.getmro(B) (<class '__main__.B'>, <class '__main__.A'>, <type 'object'>) share | improve this answer | ...
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How to modify a global variable within a function in bash?

...mysecondfunc() { echo "Hello" return 4 } var="$(mysecondfunc)" num_var=$? echo "$var - num is $num_var" Gives: Hello - num is 4 share | improve this answer | fo...
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Outputting data from unit test in python

... %r", self.that ) # etc. self.assertEquals( 3.14, pi ) if __name__ == "__main__": logging.basicConfig( stream=sys.stderr ) logging.getLogger( "SomeTest.testSomething" ).setLevel( logging.DEBUG ) unittest.main() That allows us to turn on debugging for specific tests whi...