Match method
String.prototype.match is a JavaScript string method that matches a string against a regular expression and returns match information or null if no match is found.
The Well-Grounded Rubyist, Fourth Edition
A match is an operation that tests whether text satisfies a regular expression and may return information about the match.
- How it is used
- Tests strings against regular expressions when code needs either a conditional result or details of a successful match.
- How deep it goes
- Works through success, failure, captures, and result access, without descending into the matching engine.
- Examples
- Uses a captured phone number, a conditional search for `la`, and an array filter for long strings containing digits.
- What you can do after
- Apply it via Ruby’s `Regexp#match` to guard failed searches and retrieve matched text and captures.
Read how The Well-Grounded Rubyist, Fourth Edition explains match method →
Secrets of the JavaScript Ninja, Second Edition
A JavaScript method that searches a string with a regular expression and returns match information.
- How it is used
- Uses regular-expression searches to determine whether a string matches and retrieve matching text or captures.
- How deep it goes
- Explains result arrays for local and global searches, including capture behavior, and defers referencing captures within the regex.
- Examples
- Uses an HTML string to compare matching tags locally and globally, then searches them with exec.
- What you can do after
- Understand how local and global regular-expression searches differ in returned matches and captures.
Read how Secrets of the JavaScript Ninja, Second Edition explains match method →
Related concepts
- arrayproduces · An array is an indexed, ordered collection of elements arranged in one or more dimensions, with elements accessed by position.
- regular expressionuses · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
- MatchDataproduces · MatchData is a Ruby object containing the results, captured substrings, and locations associated with a regular-expression match.
- missing valueproduces · A missing value is a marker or condition indicating that an expected data value or reference is absent, unavailable, unknown, or inapplicable.
- global regular expressionused by · A JavaScript regular expression with the g flag, which enables successive matching across a string.
- regex groupingcontrasts with · A regex capturing group is a parenthesized regular-expression subpattern whose matched text is retained for separate access or reference.
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