From: Martin DeMello <martindemello@...>
Date: 2010-10-07T04:53:32+09:00
Subject: Re: setting local variables in a binding

On Thu, Oct 7, 2010 at 12:38 AM, John Sikora <john.sikora@xtera.com> wrote:
> Hmmm, it seems to work when x is already defined (in 1.9.2):
>
> irb(main):001:0> x=4
> => 4
> irb(main):002:0> b=binding
> => #<Binding:0xfa2ab0>
> irb(main):003:0> eval("x=5", b)
> => 5
> irb(main):004:0> x
> => 5
> irb(main):005:0>
>
> If I do not set x to a value beforehand, I get the same error. Do not
> know why though.

Oddly enough, if x is defined beforehand you don't even need the binding:

ruby-1.9.2-p0 > x = 5
 => 5
ruby-1.9.2-p0 > eval "x = 42"
 => 42
ruby-1.9.2-p0 > x
 => 42

martin