大约有 40,000 项符合查询结果(耗时:0.0501秒) [XML]

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Why is the .bss segment required?

...(In detail, the address of the objects in .bss would probably be different from the address if it was in the .data segment.) In the first program, a would be in the .data segment and b would be in the .bss segment of the executable. Once the program is loaded, the distinction becomes immaterial. ...
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What are important languages to learn to understand different approaches and concepts? [closed]

...me if I'm wrong, but I think Python sortof does continuations already. And from what I have read, I'd rather learn Factor and Objective-C than Forth and Smalltalk, but I might be cutting corners there. – Pepijn Oct 18 '10 at 11:58 ...
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mkdir -p functionality in Python [duplicate]

Is there a way to get functionality similar to mkdir -p on the shell from within Python. I am looking for a solution other than a system call. I am sure the code is less than 20 lines, and I am wondering if someone has already written it? ...
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Get the short Git version hash

Is there a cleaner way to get the short version hash of HEAD from Git? 8 Answers 8 ...
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How do I compile a Visual Studio project from the command-line?

...path. Either start the Visual Studio build environment and run your script from there, or modify the paths in Python (with os.putenv). share | improve this answer | follow ...
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seek() function?

...e. It's important to note that its syntax is as follows: fp.seek(offset, from_what) where fp is the file pointer you're working with; offset means how many positions you will move; from_what defines your point of reference: 0: means your reference point is the beginning of the file 1: means yo...
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What is the best (idiomatic) way to check the type of a Python variable? [duplicate]

...s if somebody passes a unicode string to your function? Or a class derived from dict? Or a class implementing a dict-like interface? Following code covers first two cases. If you are using Python 2.6 you might want to use collections.Mapping instead of dict as per the ABC PEP. def value_list(x): ...
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How to design a database for User Defined Fields?

...define the data domains. Don't underestimate the performance hit resulting from on-the-fly data type conversion. Such constraints also help RDBMS query optimizers develop more effective plans. Should you ever need to use foreign keys, built-in declarative referential integrity is rarely out-per...
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Java Generics: Cannot cast List to List? [duplicate]

...t;? extends Tree> b1 = a1; ... because then you can only fetch things from b1, and they're guaranteed to be compatible with Tree. You can't call b1.add(...) precisely because the compiler won't know whether it's safe or not. Have a look at this section of Angelika Langer's Java Generics FAQ fo...
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How do I avoid capturing self in blocks when implementing an API?

...swer Instead of accessing self directly, you should access it indirectly, from a reference that will not be retained. If you're not using Automatic Reference Counting (ARC), you can do this: __block MyDataProcessor *dp = self; self.progressBlock = ^(CGFloat percentComplete) { [dp.delegate myAP...