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How to get exit code when using Python subprocess communicate method?
...mport subprocess as sp
child = sp.Popen(openRTSP + opts.split(), stdout=sp.PIPE)
streamdata = child.communicate()[0]
rc = child.returncode
(*) This happens because of the way it's implemented: after setting up threads to read the child's streams, it just calls wait.
...
How to show only next line after the matched one?
... is your friend...
Use grep -A1 to show the next line after a match, then pipe the result to tail and only grab 1 line,
cat logs/info.log | grep "term" -A1 | tail -n 1
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iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出来，如果此时把动画放在viewDidLoad中，可能会造成动画无法显示。当然也不建议把耗时的网络请求和动画效果都放在viewDidLoad中，界面的阻塞也会造成动画无法显示。可以尝试把动画放在viewDidAppear,viewWillAppear方法中。对于这类...
Repeat command automatically in Linux
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This is useful for if you need to pipe the output somewhere (like bar aint recursive)
– Stephen Smith
Jan 10 '15 at 16:18
1
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Web Service vs WCF Service
...ication mechanisms. With it, you can communicate using Peer to Peer, Named Pipes, Web Services and so on.
You can’t compare them because WCF is a framework for building interoperable applications. If you like, you can think of it as a SOA enabler. What does this mean?
Well, WCF conforms to somet...
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
...tively also filename arguments
The functions take extra steps to handle SIGPIPE in the usual way (quiet termination with exit code 141), as opposed to breaking noisily. This is important when piping the function output to a pipe that is closed early, such as when piping to head.
A performance compa...
Extracting specific columns from a data frame
...df1 %>%
select(A, B, E)
This can also be written without the %>% pipe as:
select(df1, A, B, E)
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How do I move files in node.js?
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fs.unlink(oldPath, callback);
});
readStream.pipe(writeStream);
}
}
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SHFileOperation函数总结（文件夹的移动、复制、删除） - C/C++ - 清泛网 -...
...大小?并取得这个内存块的内容呢?
hNameMappings 是简单LPVOID无法使用loop
要使用hNameMappings，必须定义一个结构体
struct HANDLETOMAPPINGS {
UINT uNumberOfMappings; // number of mappings in array
LPSHNAMEMAPPING lpSHNameMapping; // pointer to array of mappings
};
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Grepping a huge file (80GB) any way to speed it up?
...l. To grep a big file in parallel use:
< eightygigsfile.sql parallel --pipe grep -i -C 5 'db_pd.Clients'
Depending on your disks and CPUs it may be faster to read larger blocks:
< eightygigsfile.sql parallel --pipe --block 10M grep -i -C 5 'db_pd.Clients'
It's not entirely clear from you...