The regular expressions guides

Wikipedia defines regular expressions like this: In computing, a regular expression, also referred to as regex or regexp, provides a concise and flexible means for matching strings of text, such as particular characters, words, or patterns of characters. A regular expression is written in a formal language that can be interpreted by a regular expression processor, a program that either serves as a parser generator or examines text and identifies parts that match the provided specification.

Regular expressions - theory

Online regular expressions tester

Comments

Popular posts from this blog

How to generate user documentation from Perl script?

35 Google open-source projects that you probably don't know