Performing Pattern Matching with Perl Regular Expressions
A Brief Overview
Perl regular expressions enable you to perform pattern matching by using functions. A regular expression is a sequence of strings that defines a search pattern.
For example, suppose you have the Certadv.NANumbr data set, which contains phone numbers for the United States, Canada, and Mexico.
Figure 14.3 Certadv.NaNumbr Data Set (partial output)
By using a regular expression, you can find valid values for Phone. The advantage of using regular expressions is that you can often accomplish in only one Perl regular expression function something that would require a combination ...