regex repeating pattern

In a recent project, it was found that the previous regular matching modules had a very bad performance penalty for long string matching, so the various regular matches under the long string were slightly studied and attached with examples. This

Regular expressions (Regular expressions) are a set of grammar matching rules for various languages, such as Perl. NET and Java both have theirThe corresponding shared regular Expression class library. In. NET, this class library is called a

There was a time when regular expression learning was hot and trendy, and there were several regular expression posts in csdn one day, and that time, with the help of the Forum and the C # string and regular expression reference manual published by

Transferred from: http://www.cnblogs.com/KissKnife/archive/2008/03/23/1118423.htmlAlso recommended is an article on regular expressions: http://www.unibetter.com/deerchao/zhengzhe-biaodashi-jiaocheng-se.htm(1) "@" symbol"@" means that the string

1 OverviewGreedy and non-greedy mode affects the matching behavior of sub-expressions modified by quantifiers, and greedy mode matches as much as possible while the whole expression matches successfully, while not greedy mode matches as few as

IntroductionRemember a few years ago in the web crawler after the information extraction, for the source of the Web page hidden to extract information, such as comments, user information, such as attribute information, directly using Htmlparser to

What is a regular expressionRegular expressions are powerful tools for verifying and manipulating strings. A simple understanding of regular expressions can be thought of as a special validation string. The common use of regular expressions is to

Regular Expressions (Regular expression, or regex) are strings that are used to match and manipulate text, which is created in a regular expression language that is used primarily to retrieve and replace certain text.This article is only a small

Original author: a.m. kuchling (amk@amk.ca) Licensing: Authoring Sharing protocol Translation staff: Firehare Proofreading Staff: Leal Applicable version: Python 1.5 and subsequent versions http://wiki.ubuntu.org.cn/Python%E6%AD%A3%E5%88%99%E8%A1%A8%

By its very nature, a regular expression (or RE) is a small, highly specialized programming language that is embedded in Python and implemented through the RE module. With this small language, you can specify rules for the set of strings that you