in reply to Yet Another Rosetta Code Problem (Perl, Ruby, Python, Haskell, ...)
Shorter Perl 5 variants:
Destroys $s:
$s="ZBBBCZZ"; $s=~s/((.)\2*)/push@x,$1/eg;
Nondestructive:
$s="ZBBBCZZ"; $s=~s/((.)\2*)/push@x,$1;$1/eg;
Needs a counter $i:
$s="ZBBBCZZ"; @x=grep++$i%2,$s=~/((.)\2*)/g;
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