Node:The Simple, Next:Pattern Matching, Previous:The Theory Behind It All, Up:Regular Expressions

The Simple

We can start our discussion of regular expression by considering the simplest of operators that can actually be used to create all possible regular expressions ¹. All the other regular expression operators can actually be reduced into a set of these simple operators.

• Simple Characters:
• The * Special Character:
• The . Character:
• The | Character:
• Grouping with ()s:
• The Anchor Characters:

Footnotes

1. Actually, Perl regular expressions have a few additional features that go beyond the traditional, simple set of regular expressions, but these are an advanced topic.

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