Regex: Regular expressions are used in search

Regular expressions are used in search engines, in search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK, and in lexical analysis. Regular expressions are supported in many programming languages. Search, filter and view user submitted regular expressions in the regex library. Over 20,000 entries, and counting! Start by understanding the special characters used in regex, such as ".", """, "+", "?", and more. Choose a programming language or tool that supports regex, such as Python, Perl, or grep. Introduction The following pages are intended to give you a solid foundation in how to write regular expressions (Also referred to as regex or RE's). A regular expression is a means for describing a particular pattern of characters of text. That's kinda a bit abstract so let's try to put it into perspective. With regular expressions you can: Search for particular items within a large body of text. eg. You may wish to identify all email addresses in some content using a text editor. Replace ...