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How many and which are the uses of “const” in C++?
...s that look still very obscure to me, one of these is const . You can use it in so many places and with so many different effects that is nearly impossible for a beginner to come out alive. Will some C++ guru explain once forever the various uses and whether and/or why not to use them?
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How would you count occurrences of a string (actually a char) within a string?
...ealised I wanted to count how many / s I could find in a string, and then it struck me, that there were several ways to do it, but couldn't decide on what the best (or easiest) was.
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Undo changes in entity framework entities
this might be a trivial question but: Since ADO.NET entity framework automatically tracks changes (in generated entities) and therefore keeps the original values, how can I rollback changes made to the entity objects?
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What can I use for good quality code coverage for C#/.NET? [closed]
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I use the version of NCover that comes with TestDriven.NET. It will allow you to easily right-click on your unit test class library, and hit Test With→Coverage, and it will pull up the report.
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What is the best way to repeatedly execute a function every x seconds?
...effectively like calling the python script every minute using a cron, but without requiring that to be set up by the user.
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Scanning Java annotations at runtime [closed]
...API
A component provider that scans the classpath from a base package. It then applies exclude and include filters to the resulting classes to find candidates.
ClassPathScanningCandidateComponentProvider scanner =
new ClassPathScanningCandidateComponentProvider(<DO_YOU_WANT_TO_USE_DEFALT_F...
How to overload __init__ method based on argument type?
...se classmethods. For instance:
>>> class MyData:
... def __init__(self, data):
... "Initialize MyData from a sequence"
... self.data = data
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... @classmethod
... def fromfilename(cls, filename):
... "Initialize MyData from a file"
... dat...
Why use def main()? [duplicate]
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Without the main sentinel, the code would be executed even if the script were imported as a module.
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Swift performSelector:withObject:afterDelay: is unavailable [duplicate]
I have an app in Objective C that I'm transitioning to Swift. In Objective C, I have this method:
3 Answers
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Python list subtraction operation
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Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - infix syntax, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
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