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argparse module How to add option without any argument?
....add_argument('--foo', '-f', action='store_true') _StoreTrueAction(option_strings=['--foo', '-f'], dest='foo', nargs=0, const=True, default=False, type=None, choices=None, help=None, metavar=None) >>> parser.parse_args() Namespace(foo=False) >>> print args.foo Traceback (m...
Ruby max integer
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@Matthias An extra bit is used to mark the value as an integer (as opposed to a pointer to an object).
– Matthew Crumley
Mar 8 '12 at 18:53
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What is “Orthogonality”?
...or instance, in one language you can have:
str.split
for splitting a string and
len(str)
for getting the lenght.
On a language more orthogonal, you would always use str.x or x(str).
When you would clone an object or do anything else, you would know whether to use
clone(obj)
or
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Passing an integer by reference in Python
...d you can't just assign the "variable" a new value because then you're actually creating a new object (which is distinct from the old one) and giving it the name that the old object had in the local namespace.
Usually the workaround is to simply return the object that you want:
def multiply_by_2(x...
How to disable scrolling temporarily?
...e scrolling is that when you scroll while scrollTo is animating, it gets really ugly ;)
35 Answers
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How to Detect if I'm Compiling Code with a particular Visual Studio version?
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_MSC_VER and possibly _MSC_FULL_VER is what you need. You can also examine visualc.hpp in any recent boost install for some usage examples.
Some values for the more recent versions of the compiler are:
MSVC++ 14.24 _MSC_VER == 1924 ...
Rebase a single Git commit
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how can a question specifically called 'git rebase ...' have the accepted answer than contains a cherry-pick, which is a totally different concept and sometimes per se considered unclean?
– Bondax
Oct 13 '15 at 9:...
Delete multiple objects in django
...sing a webpage. There is no category to select from so I can't delete from all of them like that. Do I have to implement my own delete form and process it in django or does django have a way to already do this? As its implemented in the admin interface.
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Forward declaring an enum in C++
...can't know the storage required for the enum variable. C++ Compiler's are allowed to specify the actual storage space based on the size necessary to contain all the values specified. If all that is visible is the forward declaration, the translation unit can't know what storage size will have been...
Algorithm for creating a school timetable
...ere are known solutions for algorithm of creating a school timetable. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teachers associated with each ot...