Working with Sets of Characters in Regular Expressions

This chapter is from the book

Learning Regular Expressions

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This chapter is from the book

This chapter is from the book 

Learning Regular Expressions

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Summary

Metacharacters [ and ] are used to define sets of characters, any one of which must match (OR in contrast to AND). Character sets may be enumerated explicitly or specified as ranges using the – metacharacter. Character sets may be negated using ^; this forces a match of anything but the specified characters.