From: Jeremy Bopp <jeremy@...>
Date: 2012-03-29T06:48:34+09:00
Subject: Re: copy file into new without dups, eol problem

On 03/28/2012 04:25 PM, Jan E. wrote:
> 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.

In Ruby 1.9, which the OP is using, File.readlines /can/ handle this
better.  You can specify the mode in which to open the file directly as
a hash option.

Or is the solution "ugly" because you have to manually specify binary
mode when opening files?

-Jeremy