Here's the no regex simple iterator version. Just for comparison as I suspect that there is a faster method.
use Data::Dumper;
my $string =' aaaa bbbbccccccccbbbb aaaabbbbbcdddddddddddddddd
+dddd';
my (@res, $c, $p, $i);
$p = 0;
$c = substr($string,$p,1);
for ($i=1; $i<length($string); $i++) {
next if ($c eq substr($string,$i,1));
push (@res, [$c,$p,($i-$p)]);
$c = substr($string,$i,1);
$p = $i;
}
push (@res, [$c,$p,($i-$p)]);
Dumper (\@res);
Dingus
Enter any 47-digit prime number to continue.
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