in reply to Removing duplicates from list

(Not a perl answer, but still:) Pipe the output to uniq: 
perl my_script.pl | uniq

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Perl is a fantastic language for writing one-liners, scripts, and full-on applications, but the shell and common shell utilities are incredily useful, too.

Correction: 

perl my_script.pl | sort | uniq

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------------
:Wq
Not an editor command: Wq

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Re: Re: Removing duplicates from list
by sgifford (Prior) on Oct 14, 2003 at 04:08 UTC

    uniq will only work if the items are sorted (or at least if all of the identical items are consecutive). 

    $ printf "a\nb\na\n" |uniq
a
b
a

    sort |uniq would work, though, or sort -u.

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