Learning Regular Expressions by Ben Forta

Author:Ben Forta [Forta, Ben]
Language: eng
Format: epub, pdf, mobi
Publisher: Pearson Education
Published: 2018-04-30T22:00:00+00:00

Tip

Regular expressions like this one can look overwhelming. The key to understanding them is to dissect them, analyzing and understanding one subexpression at a time. Start from the inside and work outward rather than trying to read character by character from the beginning. It is a lot less complex than it looks.

Summary

Subexpressions are used to group parts of an expression together and are defined using ( and ). Common uses for subexpressions include being able to control exactly what gets repeated by the repetition metacharacters and properly defining OR conditions. Subexpressions may be nested, if needed.

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