From: Brian Candler <b.candler@...>
Date: 2009-03-04T18:03:40+09:00
Subject: Re: implement "paste" using ruby

Oliver wrote:
> If I want to do it in Ruby, and number of files is a variable, and
> each file itself can be potentially huge ... what would be the most
> cost efficient way of implementing this?

Assuming the number of files to paste together is reasonable (say under 
1000), then I'd simply open all the files up front:

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

and then inside a loop use 'gets' to pick one line from each, and output 
those values together.

HTH,

Brian.
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