大约有 47,000 项符合查询结果(耗时:0.0320秒) [XML]

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What is the meaning of single and double underscore before an object name?

...at least two leading underscores, at most one trailing underscore) is textually replaced with _classname__spam, where classname is the current class name with leading underscore(s) stripped. This mangling is done without regard to the syntactic position of the identifier, so it can be used to define...
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How can I time a code segment for testing performance with Pythons timeit?

...r if you want to average the time elapsed by several runs, you have to manually call the function multiple times (As I think you already do in you example code and timeit does automatically when you set its number argument) import time def myfast(): code n = 10000 t0 = time.time() for i in ran...
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How do I get bash completion to work with aliases?

...d also add __git_complete g __git_main to get code completition working on all git commands. – Ondrej Machulda Apr 15 '13 at 12:03 ...
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How to implement a good __hash__ function in python [duplicate]

... are equal. It also shouldn't change over the lifetime of the object; generally you only implement it for immutable objects. A trivial implementation would be to just return 0. This is always correct, but performs badly. Your solution, returning the hash of a tuple of properties, is good. But note...
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What is uint_fast32_t and why should it be used instead of the regular int and uint32_t?

... int may be as small as 16 bits on some platforms. It may not be sufficient for your application. uint32_t is not guaranteed to exist. It's an optional typedef that the implementation must provide iff it has an unsigned integer type of exactl...
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What it the significance of the Javascript constructor property?

...the constructor property is used in a few places. However, I think the overall gist still applies. Thanks to T. J. Crowder for pointing that out in the comments, and please read his answer for a fuller picture of the current situation. Original answer The constructor property makes absolutely no pra...
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How to import classes defined in __init__.py

... wow, the word "helper" really starts to loose meaning in that example. However, you've shown me what I was looking for. – scottm Feb 24 '09 at 21:06 ...
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Truncating all tables in a Postgres database

I regularly need to delete all the data from my PostgreSQL database before a rebuild. How would I do this directly in SQL? ...
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How to identify platform/compiler from preprocessor macros?

... I'm sorry, but this answer is quite incorrect on all accounts and doesn't even answer the question. – rubenvb Jan 27 '15 at 20:13 ...
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When to use setAttribute vs .attribute= in JavaScript?

... This answer is not clear enough...I don't really feel I understand this yet. – temporary_user_name Oct 24 '13 at 21:48 1 ...