# Re: Question about regular expression

**URL:** <https://www.ruby-forum.com/t/re-question-about-regular-expression/95399>\
**Category:** Ruby\
**Created:** [January 17, 2006, 9:38am UTC](https://www.ruby-forum.com/t/re-question-about-regular-expression/95399 "2006-01-17T09:38:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Gennady\_B](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/c57346/32.png) [@Gennady\_B](https://www.ruby-forum.com/u/Gennady_B)\
**Post date:** [January 17, 2006, 9:38am UTC](https://www.ruby-forum.com/t/re-question-about-regular-expression/95399/1 "2006-01-17T09:38:52Z")

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^ as a first character inside [] indicates negation, for example [^abc]  
means a character other then ‘a’, ‘b’ or ‘c’.