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return part of a string that matches a pattern? Posted by khuennekens (khuennekens), 13 January 2003 I am reading in a file as a long string. There are certain key words in this file that separate different pieces of information. As an example, let's say you have a string like this: "one here is some information two here's some other info three even more info four it's all different five", and you want to know what is the information between the words "two" and "three". I can easily ask for a match m/two.*three/ but how can i find out what the actual pattern that matched is? how do i find out what's between two and three? This really has me stumped. Thanks! Posted by admin (Graham Ellis), 13 January 2003 If you put round brackets round the "interesting bits" that you want to extract, they'll be saved into the special variable $1.Example: Code:
If you use more than one set of brackets, you'll also get $2, $3, etc ... and if you save the result of the match into a list, you can get the results into a named variable as well. Add a "g" modifier after the final /, and you get a global match - in a scalar context it will give you the next match each time (use that in a loop), and in a list context it gives you a list of all matches. Perl is a very exciting language - lots of ways to do anything ![]() This page is a thread posted to the opentalk forum
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Comment by Anon (published 2010-05-18) Great answer for my question. Ranked high in my google search. [#3573] You can Add a comment or ranking or edit your own comments There are presently 1 new comment(s) pending publication on this page Average page ranking - 5.0 |
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