From: Devin Mullins <twifkak@...>
Date: 2005-10-06T12:25:40+09:00
Subject: Re: One-liner removing duplicate lines

Jeremy Kemper wrote:

> On Oct 5, 2005, at 7:11 PM, William James wrote:
>
>> awk '!a[$0]++' infile >outfile
>
> My head a splode.  Old school.

Seriously. Awe.

Here's different way. Not a golf-winner, but maybe more Rubyish?
ruby -e"o=nil; ARGF.each {|l| puts l or o=l unless o==l}" infile > outfile

Devin
Or disgust. Not sure.