Here is one way to do it with splice and join: 

use strict;
use warnings;

my $string = "PERLPERLPEBLPEBLPERL";

my @array = split( '', $string );

while( scalar @array )
{
    my $extracted = join( '', splice( @array, 0, 4 ) );

    print "[$extracted]\n";
}

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In reply to Re^3: how to splice an array? by bobf
in thread how to splice an array? by heidi

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