regex - Split binary number into groups of zeros and ones -

i have binary number, example 10000111000011, , want split groups of consecutive 1s , 0s, 1 0000 111 0000 11.

i thought that's great opportunity use look-arounds: regex uses positive look-behind digit (which captures later backreferencing), negative look-ahead same digit (using backreference), should split whenever digit followed digit not same.

use strict; use warnings; use feature 'say';  $bin_string = '10000111000011'; @groups = split /(?<=(\d))(?!\g1)/, $bin_string;  "@groups"; 

however, results in

1 1 0000 0 111 1 0000 0 11 1 

somehow, captured digit inserted @ every split. did go wrong?

here small fix code:

my @groups = split /(?<=0(?!0)|1(?!1))/, $bin_string; 

the problem experience when using split captured texts output in resulting array. so, solution rid of capturing group.

since have 0 or 1 in input, pretty easy alternation , lookahead making sure digits changed.

see demo