clearly not as clean as the regexp solutions, but just for laughs
perl -le '/$c/||$i++, $d[$i].=$c=$_ for split "","aaaabbbccdaaa"; prin
+t "@d"'
aaaa bbb cc d aaa

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In reply to Re: Elegant way to split into sequences of identical chars? by ivancho
in thread Elegant way to split into sequences of identical chars? by pKai

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