I think ikegami meant $i^=1, i.e.: 

my @words = grep $i^=1, split /(?<=(.))(?!\1)/, $string;

[download]
which does work.

In reply to Re^5: Split a string based on change of character by eyepopslikeamosquito
in thread Split a string based on change of character by eyepopslikeamosquito

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