You don't need that exists-clause: 

my %rh_count;
$rh_count{$string}++;

[download]
is just fine.

But you are not summing the values up, you are merely counting them - is that what you want?

(Update: corrected spelling)

Perl 6 in German

In reply to Re: using hashes to count by moritz
in thread using hashes to count by spiros

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