August 2016
Intermediate to advanced
635 pages
14h 5m
English
book
JavaScript: Functional Programming for JavaScript Developers
by Ved Antani, Simon Timms, Dan Mantyla
Content preview from JavaScript: Functional Programming for JavaScript DevelopersBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Greedy and lazy quantifiers
All the quantifiers that we discussed so far are greedy. A greedy quantifier starts looking at the entire string for a match. If there are no matches, it removes the last character in the string and reattempts the match. If a match is not found again, the last character is again removed and the process is repeated until a match is found or the string is left with no characters.
The \d+ pattern, for example, will match one or more digits. For example, if your string is 123, a greedy match would match 1, 12, and 123. Greedy pattern h.+l would match hell in a string hello—which is the longest possible string match. As \d+ is greedy, it will match as many digits as possible and hence the match would be 123.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.