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Regular Expression Details

Title Test Find Pattern Title
Expression
(?<=^|[\s ]+)[^\!\@\%\$\s ]*([\!\@\%\$][^\!\@\%\$\s ]*){2,}(?=[\s ]+|$)
Description
That pattern will filter for words that contain more than 1 instance of any of the following characters: ! $ % @. May be useful in filtering for spam. Requires lookahead and lookbehind support in the underlying regex engine.
Matches
f%c$ | v!@gra | v@gr@
Non-Matches
f%ck | viagra
Author Rating: Not yet rated. Darren Neimke
Source
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Existing User Comments

Title: Redefining boundaries and lexing through a target string.
Name: Darren Neimke
Date: 3/8/2004 2:11:42 PM
Comment:
I've written about some of the more interesting parts of this expression here: http://blogs.regexadvice.com/dneimke/archive/2004/03/09/722.aspx


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