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CHAPTER 10 Pattern Matching with Regular Expressions

CHAPTER 10


Pattern Matching with Regular Expressions

A regular expression is an object that describes a pattern of characters. The JavaScript RegExp class represents regular expressions, and both String and RegExp define methods that use regular expressions to perform powerful pattern-matching and search-andreplace functions on text. JavaScript’s regular expression grammar is a fairly complete subset of the regular-expression syntax used by Perl 5, so if you are an experienced Perl programmer, you already know how to describe patterns in JavaScript.1

This chapter begins by defining the syntax that regular expressions use to describe textual patterns. It then moves on to describe the String and RegExp methods that use regular expressions.

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