A step forward (for some definition of forward) could've been 

local our %counts;
$string =~ /(?:^|,)([^,]*)(?:,|\z)(?{ $counts{$1}++ })(?!)/;

[download]
if one really wants to do it the regex way. ;-)

lodin

In reply to Re^4: how to count the no of repeats in a string by lodin
in thread how to count the no of repeats in a string by koleti

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