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Part III: Appendixes > Regular Expressions

A.16. Regular Expressions

Regular expressions are, in effect, an extra language that lives inside the Perl language. In Perl, they have quite a lot of features. First, I'll summarize how regular expressions work in Perl; then, I'll present some of their many features.

A.16.1. Overview

Regular expressions describe patterns in strings. The pattern described by a single regular expression may match many different strings.


  

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