From: Rick DeNatale <rick.denatale@...>
Date: 2009-03-05T02:33:24+09:00
Subject: Re: implement "paste" using ruby

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On Tue, Mar 3, 2009 at 11:28 PM, Oliver <fwang2@gmail.com> wrote:

> hi, all
>
> I have a programming question: in the *NIX world, there is a small
> utility named "paste", that can combine several files together by
> columns. For example:
>
> file "x.dat"'s content is:
> 1
> 2
> 3
> ...
>
> file "y.dat"'s content is:
> a
> b
> c
> ...
>
> then "paste x.dat y.dat > z.dat" will generate z.dat as:
> 1 a
> 2 b
> 3 c
> ...
>
>
 #!/usr/bin/env ruby -wKU

files = ARGV.map { |fname| File.open(fname) }

while (lines = files.map {|file| file.gets}).any? {|line| line}
  puts lines.map {|line| line.to_s.chomp}.join("\t")
end





-- 
Rick DeNatale

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