From: Justin Johnson <justinj@...>
Date: 2002-07-24T21:07:48+09:00
Subject: Re: Eval question

I see.  Thanks.

Is there anyway other way to create locals without explicitly setting them?

--
Justin Johnson.

"Tom Gilbert" <tom@linuxbrit.co.uk> wrote in message
news:20020724113537.GR6415@offended.co.uk...
> * Justin Johnson (justinj@mobiusent.com) wrote:
> > I've got a question about 'eval'.  In the following example (which
doesn't
> > work by the way) where does 'val' live?
> >
> > class MyClass
> >   def tryIt( str )
> >     eval str
> >     p val
> >   end
> > end
> >
> > a = MyClass.new
> > a.tryIt( "val = 10" )
> >
> > I was initially thinking that 'val' would be treated as a local to
'tryIt'.
> > Maybe 'eval' works a little differently to how I thought it might?
>
> It's local to the scope of the string being eval'd. Try this:
>
> class MyClass
>   def tryIt( str )
>     val = eval str
>     p val
>   end
> end
>
> a = MyClass.new
> a.tryIt( "val = 10" )
>
> Tom.
> --
>    .^.    .-------------------------------------------------------.
>    /V\    | Tom Gilbert, London, England | http://linuxbrit.co.uk |
>  /(   )\  | Open Source/UNIX consultant  | tom@linuxbrit.co.uk    |
>   ^^-^^   `-------------------------------------------------------'
>