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Regular Expression Tutorial - Learn How to Use Regular Expressions
Basically, a regular expression is a pattern describing a certain amount of text. Their name comes from the mathematical theory on which they are based. In this tutorial, I will teach you all you need to know to be able to craft powerful time-saving regular expressions. I will start with the most basic concepts, so that you can follow this tutorial even if you know nothing at all about regular expressions yet.
RegularExpressions.info. Reference>Editing>Search>Regular Expressions
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regular expressions provide a concise and flexible means for identifying strings of text of interest, such as particular characters, words, or patterns of characters. Regular expressions (abbreviated as regex or regexp, with plural forms regexes, regexps, or regexen) are 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.
