From: snacktime <snacktime@...>
Date: 2006-11-03T06:16:59+09:00
Subject: Re: str1 = str2 is not a copy?!?

On 11/2/06, Joe Ruby MUDCRAP-CE <joeat303@yahoo.com> wrote:
> I have:
>
> File.foreach(data_file) do |line|
>   line.strip!
>
>   puts line
>
>   base_name = line
>
>   puts line
>
>   base_name.sub!('www.', '')
>   base_name.sub!(/\.\w+$/, '')
>
>   puts line
> end
>
> Which outputs:
>
> www.domain.com
> www.domain.com
> domain
>
> WHY is var line getting changed by operations on var base_name? Isn't
> 'base_name = line' supposed to create a copy? '=' in this case seems to
> be acting like an alias or something.

As far as my understanding goes most assignments just copy object
references.  Try something like base_name = line.clone.

Chris