From: Jan Svitok <jan.svitok@...>
Date: 2007-02-07T23:27:17+09:00
Subject: Re: File.write bug

On 2/7/07, Chris Shea <cmshea@gmail.com> wrote:
> On Feb 7, 5:48 am, "Wouter Smeenk" <woutersme...@gmail.com> wrote:
> > Hello all,
> >
> > I'm relatively new to ruby and I think I've found a bug. It doesn't
> > seem to be in my code.
> >
> > I written this test script:
> >
> > # test.rb #####################
> > File.open("blaat.txt","w") do |f|
> >   f.write "test\r\n"
> >   f.write "test\r"
> >   f.write "test\n"
> > end
> > ############################
> >
> > And it produces unexpected results. It seems to insert a "\r" before
> > every "\n". I have included the result of this script on my computer.
> >
> > I'm running Windows XP SP2 and ruby 1.8.5.
> >
> > Does anyone know what the problem could be and how to fix it?
> >
> > Wouter Smeenk
> >
> > [blaat.txt]test
> > test test
>
> It's not a bug.
>
> On Windows, "\n" evaluates to a carriage return and a line feed, what
> you may be used to calling "\r\n". If you open blaat.txt in SciTE (or
> any similar text editor) and view the ends of lines (View -> End of
> Line), you'll see.
>
> So what's happening is that f.write "test\r\n" is writing a carriage
> return, then "\n" which is a carriage return and a line feed.

...and if you don't like the behaviour, use File.open('xxxx', 'wb') -
notice the 'b'.
Or specify mode as IO::WRONLY | IO::BINARY

The same works for Python as well.