...offset parameter of the str.find() method. This avoids lots of memory use, and relying on the overhead of a regexp when it's not needed. [edit 2016-8-2: updated this to optionally support regex separators] def isplit(source, sep=None, regex=False): """ generator version of str.split() ...

...语言有帮助。这篇文章产生的背景是在微博上，看到@Laruence同学出了一个关于C语言的题，微博链接。微博截图如下。我觉得好多人对这段代码的理解还不够深入，所以写下了这篇文章。为了方便你把代码copy过去编译和调试，我...

...asted memory". The Linux kernel keeps around huge amounts of file metadata and files that were requested, until something that looks more important pushes that data out. It's why you can run: find /home -type f -name '*.mp3' find /home -type f -name '*.aac' and have the second find instance run a...

I am wondering how you can get the system CPU usage and present it in percent using bash, for example. 5 Answers ...

...ring to the second byte in the process's memory, 2 the third, 3 the fourth and so on.... What happened to 0 and the first byte? Well, we'll get to that later - see null pointers below. For a more accurate definition of what pointers store, and how memory and addresses relate, see "More about memo...

...ty of details of why checking the type of an object is usually a bad idea, and what you probably should be doing instead. – Jeff Shannon Apr 2 '09 at 9:28 2 ...

In R, mean() and median() are standard functions which do what you'd expect. mode() tells you the internal storage mode of the object, not the value that occurs the most in its argument. But is there is a standard library function that implements the statistical mode for a vector (or list)? ...

... exactly is meant by "longest word": is it better to have a 20-letter word and ten 3-letter words, or is it better to have five 10-letter words? Once you settle on a precise definition, you just have to change the line defining wordcost to reflect the intended meaning.) The idea The best way to pr...

... users(user_id); I try to stick with the same field names in referencing and referenced tables, as in user_id in the above example. When this is not practical, I also append the referenced field name to the foreign key name. This naming convention allows me to "guess" the symbolic name just by l...

... 6. 延伸阅读 * http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html * The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets(关于字符集的最基本知识) http://www.joelonsoftware.com/articles/Unicode.htm...