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deciding among subprocess, multiprocessing, and thread in Python?
...o parallelize my Python program so that it can make use of multiple processors on the machine that it runs on. My parallelization is very simple, in that all the parallel "threads" of the program are independent and write their output to separate files. I don't need the threads to exchange informa...
What is the purpose of “&&” in a shell command?
As far as I know, using & after the command is for running it in the background.
9 Answers
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How can I split a JavaScript string by white space or comma?
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input.split(/[ ,]+/);
This particular regex splits on a sequence of one or more commas or spaces, so that e.g. multiple consecutive spaces or a comma+space sequence do not produce empty elements in the results.
share
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What is a plain English explanation of “Big O” notation?
I'd prefer as little formal definition as possible and simple mathematics.
41 Answers
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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...激活窗口
SWP_NOMOVE：保持当前位置（忽略x和y）
SWP_NOREDRAW：窗口不自动重画
SWP_NOSIZE：保持当前大小（忽略cx和cy）
SWP_NOZORDER：保持窗口在列表的当前位置（忽略hWndInsertAfter）
SWP_SHOWWINDOW：显示窗口
这些参数可...
What data type to use for hashed password field and what length?
I'm not sure how password hashing works (will be implementing it later), but need to create database schema now.
10 Answers...
Determine Whether Two Date Ranges Overlap
Given two date ranges, what is the simplest or most efficient way to determine whether the two date ranges overlap?
35 Answ...
How do I check if a string is unicode or ascii?
...bytes type that holds raw bytes.
In Python 2, a string may be of type str or of type unicode. You can tell which using code something like this:
def whatisthis(s):
if isinstance(s, str):
print "ordinary string"
elif isinstance(s, unicode):
print "unicode string"
else:
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How to use SVN, Branch? Tag? Trunk?
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The subversion book is an excellent source of information on strategies for laying out your repository, branching and tagging.
See also:
Do you continue development in a branch or in the trunk
Branching strategies
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Should I return a Collection or a Stream?
...n will be. It depends on whether the result changes over time, and how important consistency of the returned result is. And it depends very much on how the user is likely to use the answer.
First, note that you can always get a Collection from a Stream, and vice versa:
// If API returns Collection...