From: Robert Klemme <bob.news@...>
Date: 2006-02-04T21:43:19+09:00
Subject: Re: Extract hash into local variables?

csn <cool_screen_name90001@yahoo.com> wrote:
> Is there a Ruby function similar to PHP's extract/list? What I'd like
> to do is:
>
> def foo(args={a=>1, b=>2, c=>3})
>  args.extract
>
>  puts a
>  puts b
>  puts c
> end
>
> Thanks
> csn

You cannot do that as local variables have to be declared in the code. 
You'll have to do that by hand, i.e.,

def foo(args={:a=>1, :b=>2, :c=>3})
  a = args[:a] || 1
  b = args[:b] || 2
  a = args[:c] || 3

  puts a,b,c
end

or

def foo(args={})
  args = args.merge(:a=>1, :b=>2, :c=>3)
  a = args[:a]
  b = args[:b]
  a = args[:c]

  puts a,b,c
end

What do you need that for?  Maybe there is a better solution.

Kind regards

    robert