Is pack/unpack a good solution for you? 
#! /usr/bin/perl
use warnings;
use strict;

my $sample = "041424344454647484940414";
my $expected = '012345678901';

my $result = pack '(a)*', unpack '(ax)*', $sample;

use Test::More tests => 1;
is $result, $expected;

[download]
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re: Minimizing the amount of place holders on long identical regex by choroba
in thread Minimizing the amount of place holders on long identical regex by thanos1983

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