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Re: regex backreference

by Kenosis (Priest)
on Nov 30, 2013 at 16:49 UTC ( #1065065=note: print w/replies, xml ) Need Help??

in reply to regex backreference

Perhaps the following will be helpful:

use strict; use warnings; my %seen; while (<DATA>) { !$seen{ $. . $1 }++ and print "Line $.: $1\n" while /(\b\w{3}\b)(?=.*\1)/g; } __DATA__ foofoo foo foo foo bar foo foo bar foo bar foooof foo oof foo and bar foo foo and and bar bar foo and bar foo and bar and or and or say or say or say or say


Line 2: foo Line 3: foo Line 4: foo Line 4: bar Line 8: foo Line 8: and Line 8: bar Line 9: foo Line 9: and Line 9: bar Line 10: and Line 10: say

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[1nickt]: Corion I assume you are talking about Retry? Attempt doesn;t offer callbacks and has a much simpler interface. (Also written by someone I trust...)
[perldigious]: I train for long portaging/rowing trips by carrying my kayak to the river about a half mile from my house 2-3 times a week depending on weather... but due to a lingering winter, I haven't had long to train this year.

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