Definition:
Regular expression: A specialized computer language for matching strings of text. This often cryptic language is used within many other languages such as Ruby and, most notably, Perl, to allow programmers to match sections of text in a string. The regular expression to match all letters followed by a period, for example, could be expressed as:
[a-z]+\.
Also Known As: regex, regexp,regexes,regexps,regexen
Alternate Spellings: regex, regexp, re
