May 2015
Intermediate to advanced
112 pages
2h 14m
English
Content preview from Javascript Regular Expressions
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Grouping, alternation, and back reference
In the following table, you can find the patterns for grouping, alternation, and back reference. The grouping is used to group a set of characters in a Regex. The alternation is used to combine characters into a single regular expression, and the back reference is used to match the same text as previously matched by a capturing group:
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Pattern |
Description |
Example |
|---|---|---|
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This groups characters together to create a clause, that is, it matches |
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Parenthesis also serves to capture the desired subpattern within a pattern. |
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