How can the answer be improved?A regular expression is a string of characters that defines the pattern or patterns you are viewing. The syntax of regular expressions in Perl is very similar to what you will find within other regular programs, such as sed, grep, and awk. regular expressions perl matching
Perl's regular expression engine applies these patterns to match or to replace portions of text. While mastering regular expressions is a daunting pursuit, a little knowledge will give you great power. You'll build up your knowledge over time, with practice, as you add more and more features to your toolkit.
Perl: Matching using regular expressions. This will match between six and eight digits, but if we replaced it with 6, we could match six or more digits, whereas , 8 matches eight or less. Let's take another look at those phone numbers, at the moment it's working all right, but it's still a bit too restrictive. Regular Expressions and Matching Perl's text processing power comes from its use of regular expressions. A regular expression ( regex or regexp ) is aregular expressions perl matching Perl Example# 10 More on Pattern Matching And Regular Expressions About the Program This program demonstrates additional examples of pattern matching and substitution operations using regular expressions. Some of the more common regular expression metacharacters used for pattern matching are outlined in the charts below.
perlre Perl regular expressions. DESCRIPTION. This page describes the syntax of regular expressions in Perl. If you haven't used regular expressions before, a tutorial introduction is available in perlretut. If you know just a little about them, a quickstart introduction is available in perlrequick. regular expressions perl matching