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Re: finding duplicate data

by gjb (Vicar)
on Jan 21, 2004 at 10:49 UTC ( #322835=note: print w/ replies, xml ) Need Help??


in reply to finding duplicate data

Sounds very much like homework, so I'll just give you a tip: a hash (e.g. %data) would come in handy. You can use the data (A(01), B(02), etc) as keys and the number of times you encounter the data as values.

$data{$line}++;
would do the trick.

As a final step, you iterate over the keys (the function keys is useful here) in the hash and print those keys that have values larger than 1.

Hope this helps, -gjb-


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