Difference: RegularExpression (3 vs. 4)

Revision 422 Mar 2003 - PeterThoeny

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Regular Expressions

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Introduction

Regular expressions (REs), unlike simple queries, allow you to search for text which matches a particular pattern.

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`[^0-9a-zA-Z]`	Matches any symbol (but not a number or a letter)
`[A-Z][A-Z]*`	Matches one or more uppercase letters
`[0-9]{3}-[0-9]{2}-[0-9]{4}`	US social security number, e.g. 123-45-6789

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PNG;Chart Search for topics containing the words PNG and Chart. This is not a regular expression! But a useful facility that is enabled when regular expression searching is enabled.

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PNG;Chart Search for topics containing the words PNG and Chart. The ";" and separator is TWiki-specific and is not a regular expression; it is a useful facility that is enabled when regular expression searching is enabled.

Searches with "and" combinations

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