help in understanding a regex

by Anonymous Monk

on Nov 16, 2012 at 22:14 UTC ( #1004251=perlquestion: print w/ replies, xml )

Need Help??

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

 

#!/usr/local/bin/perl -w
$string = "/dir1/dir8/dir2";
$string =~ m|([^/]+)$|;
print $1;

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if i change the line of code as $string =~ m/([^/]+)$/ it doesent work.

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Re: help in understanding a regex by roboticus (Canon) on Nov 16, 2012 at 22:36 UTC
Yeah, you'd have to change it to `m/([^\/]+)$/` to work. The original used vertical bars so they didn't have to escape the slash in the brackets. ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply] [d/l]
Re: help in understanding a regex by 2teez (Chaplain) on Nov 16, 2012 at 22:56 UTC
with `$string =~ m/[^/]+)$/;` using strict and warnings, you would get `unmatched error [ in regex ...` Please note the usage of the "/" as the delimiter, which you have to "escape" to use within the `m//` like so: `$string =~ m/[^\/]+)$/;` Please check the subtitle `m/PATTERN/msixpodualgc` under Regexp-Quote-Like-Operators If you tell me, I'll forget. If you show me, I'll remember. if you involve me, I'll understand. --- Author unknown to me	[reply] [d/l] [select]

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