Regular Expressions 101

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Validation

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1

Regular Expression
javascript

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^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$
/

Description

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Submitted by Robin Venneman - 6 years ago