Everything you need is covered in perlintro (a 30 minute read), and perlfaq4#How can I get the unique keys from two hashes, plus a little imagination.

Here's a basic description:

  1. Declare a hash... maybe call it %words.
  2. Set up an input loop: while(my $line = <> ) { ...
  3. Chomp your input.
  4. Use the input as a hash key: $words{$line}++.
  5. After the loop ends, print the keys of the hash.

Dave

In reply to Re: unique words by davido
in thread unique words by rasy

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