From: "Jan E." <lists@...>
Date: 2012-03-29T06:25:38+09:00
Subject: Re: copy file into new without dups, eol problem

Hi,

Ruby uses the LF character ("\n") for line endings, while Windows uses 
the CR LF combination ("\r\n").

It seems you have to open the file in binary mode so that the CR LF 
don't get converted into LF:

File.open 'C:/htdocs/new.txt', 'wb+' do |file|
  lines = File.open('C:/htdocs/old.txt', 'rb', &:readlines).uniq
  file.print *lines
end

Yeah, this *is* ugly. I wonder why Ruby cannot handle that itself.

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