From: Sean O'Halpin <sean.ohalpin@...>
Date: 2005-10-06T21:59:27+09:00
Subject: Re: One-liner removing duplicate lines

On 10/6/05, Robert Klemme <bob.news@gmx.net> wrote:
> (David, I'm sorry again this is no #inject solution.)

I couldn't resist :)

  ruby -e "ARGF.inject({}) {|h, x| h.key?(x) or h[x] = puts(x); h}"

To handle missing newline at EOF:

  ARGF.inject({}) {|h, x| h.key?(x.chomp) or h[x.chomp] = puts(x); h}

Regards,

Sean