From: Philip Hallstrom <ruby@...>
Date: 2007-07-26T03:58:39+09:00
Subject: Re: Question - Passing parameters by reference

> On Thu, 26 Jul 2007, Chris Thiel wrote:
>
>> What if the method is returning something else already and you don't want
>> to have to return the changed value? How do you pass in a variable to a
>> method and have the change stick when it exists the method in ruby?
>
> You can change an object:
>
>  def change_me(str)
>    str.upcase!
>  end
>
>  s = "abc"

did you mean to say...

    s = str = "abc"

?

>  change_me(str)
>  puts s          # ABC
>
> But you can't change the bindings.  In the example, I've got s and str
> both containing references to the same string.  But the names of the
> identifiers themselves, s and str, are solely the business of their
> local scopes, which are different as between the method body and the
> calling context.
>
>
> David
>
> -- 
> * Books:
>  RAILS ROUTING (new! http://www.awprofessional.com/title/0321509242)
>  RUBY FOR RAILS (http://www.manning.com/black)
> * Ruby/Rails training
>    & consulting:  Ruby Power and Light, LLC (http://www.rubypal.com)
>
>