Re: find unique values from a file by comparing two columns

Some good answers have already been provided, but I would just like to add: in general, when you think unique, you should very often think hash.

Comment on Re: find unique values from a file by comparing two columns

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Re^2: find unique values from a file by comparing two columns by Anonymous Monk on Sep 26, 2014 at 23:03 UTC
Interesting :) `[perldoc://unique]` unique -> perlfaq4#How can I remove duplicate elements from a list or array? Use a hash. When you think the words "unique" or "duplicated", think "hash keys".	[reply] [d/l]