The trick is to use a hash to store each value as a key and increment the hash value for each instance of the array value. Take a look at Hash Keys (strings or numbers?), Not Exactly a Hash Tutorial and The Uniqueness of hashes. in the Tutorials section for stuff on hashes.

DWIM is Perl's answer to Gödel

In reply to Re: extract number of times a value appears in an array by GrandFather
in thread extract number of times a value appears in an array by Anonymous Monk

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