Pattern matching with "//"
Pattern matching with "//"
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Perl invokes a powerful tool for
pattern matching that gives the program great flexibility in controlling
matches. In Perl, a string is matched by placing it between two slashes
as follows:
/[pattern_to_match]/
Thus, /eric/ matches for the string "eric". You may also match according
to whole classes of characters using the square brackets ([]). The pattern
match will then match against any of the characters in the class. For example,
to match for any single even numbered digit, you could use the following
match:
/[02468]/
For classes including an entire range of characters, you may use the dash
(-) to represent the list. Thus, the following matches any single lower
case letter in the alphabet:
/[a-z]/
Likewise, you may use the caret (^) character within the square brackets
to match every character that is "not" in the class. The following matches
any single character that is not a digit.
/[^0-9]/
Additional Resources:
 Regular
Expressions
Table of Contents
Matching Operators
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