大约有 42,000 项符合查询结果(耗时:0.0579秒) [XML]

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Calling C/C++ from Python?

...ebsite: The Boost Python Library is a framework for interfacing Python and C++. It allows you to quickly and seamlessly expose C++ classes functions and objects to Python, and vice-versa, using no special tools -- just your C++ compiler. It is designed to wrap C++ interfaces non-intrusiv...
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Why is setTimeout(fn, 0) sometimes useful?

...o initialize the drop-down list, ready to have its selected index updated, and Your code to set the selected index Your code was consistently winning this race and attempting to set drop-down selection before the browser was ready, meaning that the bug would appear. This race existed because Java...
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Difference between 2 dates in SQLite

... SELECT julianday('now') - julianday(DateCreated) FROM Payment; share | improve this answer | follow ...
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Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception

Something I often used back in C++ was letting a class A handle a state entry and exit condition for another class B , via the A constructor and destructor, to make sure that if something in that scope threw an exception, then B would have a known state when the scope was exited. This isn't pur...
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Printf width specifier to maintain precision of floating-point value

...eventh = 1.0/7.0 results in the value below. Also shown are the preceding and following representable double floating point numbers. OneSeventh before = 0.1428571428571428 214571170656199683435261249542236328125 OneSeventh = 0.1428571428571428 49212692681248881854116916656494140625 OneSeven...
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Difference between UTF-8 and UTF-16?

Difference between UTF-8 and UTF-16? Why do we need these? 5 Answers 5 ...
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Elegant ways to support equivalence (“equality”) in Python classes

...om classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods, respectively. The easiest way I've found to do this is the following method: ...
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What is the purpose of willSet and didSet in Swift?

...seems to be that sometimes, you need a property that has automatic storage and some behavior, for instance to notify other objects that the property just changed. When all you have is get/set, you need another field to hold the value. With willSet and didSet, you can take action when the value is mo...
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SHA512 vs. Blowfish and Bcrypt [closed]

...2 (in the context of an appropriate algorithm like PBKDF2) is good enough. And the answer is yes, either algorithm is secure enough that a breach will occur through an implementation flaw, not cryptanalysis. If you insist on knowing which is "better", SHA-512 has had in-depth reviews by NIST and ot...
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Reading specific lines only

... loop to read a file, but I only want to read specific lines, say line #26 and #30. Is there any built-in feature to achieve this? ...