From: David Alan Black <dblack@...>
Date: 2002-07-18T20:23:28+09:00
Subject: Re: How to name a variable after another variable's value?

Hello --

On Thu, 18 Jul 2002, Norbert Gawor wrote:

> Kurt Euler wrote:
> > I tried to do something like this:
> >         greeting_no = "2"
> >         sp#{greeting_no}_greeting = 'Hello'
>
> greeting_no = "2"
> eval "sp#{greeting_no}_greeting = 'Hello'"

I agree that using a Hash is almost certainly a much better design --
but I just want to point out that in the above example, the variable
you create that way will only be visible in the eval block:

  $ ruby -vwe 'a="b"; eval "#{a}=1; puts b"; puts b'
  ruby 1.6.7 (2002-03-01) [i686-linux]
  1
  -e:1: undefined local variable or method `b' for
  #<Object:0x401c8ce0> (NameError)


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav