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OnInitUpdate、OnUpdate、OnDraw与OnPaint - C/C++ - 清泛网 - 专注C/C++及内核技术
OnInitUpdate、OnUpdate、OnDraw与OnPaintOnDraw，一般是收到WM_PAINT消息时调用，所以应用程序一般通过Invalidate产生WM_PAINT消息来间接调用OnDraw。当窗体无效等情况下，window也...OnDraw，一般是收到WM_PAINT消息时调用，所以应用程序一般通过In...
What's the difference between a method and a function?
... C#, there are only methods.
For C, there are only functions.
For C++ and Python it would depend on whether or not you're in a class.
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Why JavaScript rather than a standard browser virtual machine?
Would it not make sense to support a set of languages (Java, Python, Ruby, etc.) by way of a standardized virtual machine hosted in the browser rather than requiring the use of a specialized language -- really, a specialized paradigm -- for client scripting only?
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if A vs if A is not None:
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@cedbeu, Seems to depend on the value of A. I tested now python -m timeit -s"a=0" "if a: pass" "else: pass" is faster than python -m timeit -s"a=0" "if a is None: pass" "else: pass" but python -m timeit -s"a=1" "if a: pass" "else: pass" is slower. Might be platform dependant, see i...
How to use `subprocess` command with pipes
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The output of ps.communicate()[0] in python3 returns a bytes object.
– Miguel Ortiz
Aug 18 at 14:48
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How to migrate/convert from SVN to Mercurial (hg) on windows
... I tried using svn:// instead of file:// but it keeps asking for Python bindings
– fglez
May 27 '09 at 14:30
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Difference between except: and except Exception as e: in Python
...ing to watch out for" looks a little weird now, but at the time I expected Python to pick the most specific except block, regardless of where it was, and was a little disappointed to find out otherwise.
– Vanessa Phipps
Sep 5 '14 at 15:37
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Using print statements only to debug
I have been coding a lot in Python of late. And I have been working with data that I haven't worked with before, using formulae never seen before and dealing with huge files. All this made me write a lot of print statements to verify if it's all going right and identify the points of failure. But, ...
When I catch an exception, how do I get the type, file, and line number?
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@DanielPryden Python docs are also using the same unpacking method docs.python.org/2/library/traceback.html#traceback-examples
– user
Aug 7 '14 at 3:49
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List attributes of an object
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The issue of dict usage just showed up on r/python. someone pointed out that vars(a) is equivalent to a.__dict__
– David
Jan 12 '13 at 5:15
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