From: ts <decoux@...>
Date: 2001-09-27T00:44:42+09:00
Subject: [ruby-talk:21734] Re: manipulating "immutable" objects such as Fixnum from within callbacks & al...

>>>>> "B" == Brian F Feldman <green@FreeBSD.org> writes:

B> Try the example code...


pigeon% cat b.rb
#!./ruby
class Ptr
        def initialize(obj) @obj = obj end
        def []=(obj) @obj = obj end
        def []() @obj end
end
module Kernel
        def _ptr() Ptr.new(self) end
end

def foo(int)
        int[] += 1
end
x = 1._ptr
foo(x)
puts x[]
pigeon% ./ruby b.rb
2
pigeon% 


Guy Decoux