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Re: Replace the nth occurence

by choroba (Canon)
on Nov 21, 2012 at 10:39 UTC ( #1004892=note: print w/ replies, xml ) Need Help??


in reply to Replace the nth occurence

TIMTOWTDI:

#!/usr/bin/perl use warnings; use strict; use feature 'say'; sub replace { my ($string, $from, $to, $count) = @_; my $pos = '0E0'; # plain 0 means the string begins with $from while ($count-- and $pos >= 0) { $pos = index $string, $from, $pos eq '0E0' ? $pos : $pos + 1; } substr $string, $pos, 1, $to if $pos > 0; return $string; } say replace($_, ',' => '|', 2) for qw( a,b,c,d pq,rs,tu,vw ,s,t,a,r,t ,,yuck 1,2 );
لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ


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