大约有 42,000 项符合查询结果(耗时:0.0297秒) [XML]

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How to declare variable and use it in the same Oracle SQL script?

I want to write reusable code and need to declare some variables at the beginning and reuse them in the script, such as: 10...
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How to determine the encoding of text?

... FAQ:) However, some encodings are optimized for specific languages, and languages are not random. Some character sequences pop up all the time, while other sequences make no sense. A person fluent in English who opens a newspaper and finds “txzqJv 2!dasd0a QqdKjvz” will instan...
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best way to preserve numpy arrays on disk

... h5py example and pytables example – Kamil Slowikowski Sep 23 '16 at 13:15 ...
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clang error: unknown argument: '-mno-fused-madd' (python package installation failure)

...5-16]: Apple has fixed this problem with updated system Pythons (2.7, 2.6, and 2.5) in OS X 10.9.3 so the workaround is no longer necessary when using the latest Mavericks and Xcode 5.1+. However, as of now, the workaround is still required for OS X 10.8.x (Mountain Lion, currently 10.8.5) if you a...
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Timeout command on Mac OS X?

Is there an alternative for the timeout command on Mac OSx. The basic requirement is I am able to run a command for a specified amount of time. ...
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How to prove that a problem is NP complete?

...least one vertex in the cover set?) is in NP: our input X is some graph G and some number k (this is from the problem definition) Take our information C to be "any possible subset of vertices in graph G of size k" Then we can write an algorithm V that, given G, k and C, will return whether that s...
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`date` command on OS X doesn't have ISO 8601 `-I` option?

... want to print the current datetime in ISO 8601 format (preferably UTC), and it seems that this should be as simple as date -I : ...
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Download single files from GitHub

I guess most of you, developers, use any VCS , and I hope some of you use Git. Do you have any tip or trick how to get a download URL for a single file in a repository? ...
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List files recursively in Linux CLI with path relative to the current directory

... answered Oct 29 '08 at 3:34 Andru LuvisiAndru Luvisi 21.4k66 gold badges4747 silver badges6161 bronze badges ...
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What does Python's eval() do?

...was a trivial example, but you could let the user type in an arbitrary command and have python execute it. So you could have the user type in a command string and then have python run it as code. So for example: eval("__import__('os').remove('file')"). – BYS2 F...