From: david karapetyan <dkarapetyan@...>
Date: 2007-08-18T16:58:26+09:00
Subject: Re: method access to the enclosing method's locals?

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Sorry, the code below doesn't work. There are problems with variable
scoping.

On 8/18/07, david karapetyan <dkarapetyan@gmail.com> wrote:
>
> Here's one way. First define the closure then use define_method to turn
> the
> closure into an actual method.
>
> def go2(arg)
>   closure = proc { puts "Hi #{arg}" }
>   define_method(:hi,closure)
> end
>
> I haven't tested the above code so I'm not sure if it really works.
>
> On 8/18/07, david karapetyan <dkarapetyan@gmail.com> wrote:
> >
> > The general concept involved is that of a closure and it is certainly
> > possible to define closures in ruby and at some point or another someone
> > pointed out a way of turning closures into methods I don't remember how
> > though.
> >
> > On 8/17/07, Larry Kluger <rubyforum@kluger.com> wrote:
> > >
> > >
> > > Hi,
> > >
> > > How can a method gain access to the enclosing method's locals?
> > >
> > > def go2(arg)
> > >   def hi
> > >     puts "Hi #{arg}!"
> > >   end
> > >
> > >   a={:h => :hi}
> > >   send(a[:h])
> > > end
> > >
> > > go2 'Larry' ==>> NameError: undefined local variable or method `arg'
> for
> > >
> > > main:Object
> > >
> > > In go2, is there a clean way for the hi method to have access to the
> > > arg local?
> > >
> > > Thanks!
> > >
> > > Larry
> > > --
> > > Posted via http://www.ruby-forum.com/ .
> > >
> > >
> >
>

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