On 3/23/06, Philippe 'BooK' Bruhat <[EMAIL PROTECTED]> wrote:
> perl -ne'$s{$_}++||print' file
>
> with
>
> perl -ne'$$_++||print' file
>
> Three characters in one shot!I think MTV used this in the palindrome golf, at least. So it's been around for a while :) Jasper
