From: Brian Candler <b.candler@...>
Date: 2009-07-07T20:23:51+09:00
Subject: Re: Breaking the loop in case of EOF

Marcin G坦rski wrote:
> I need to break a loop when program gets an EOF from STDIN.

gets will return nil in this case.

while str = STDIN.gets
  str.chomp!
  puts "String: #{str}"
end

Beware that "STDIN.gets" is subtly different from a bare "gets". The 
first always reads from STDIN. The second will read from the files named 
on the command line if the command line is not empty. (See also ARGF).
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