From: Angel Martin <angel@...>
Date: 2004-05-19T21:41:44+09:00
Subject: Arguments and formal variables

In first place I sorprised with te behavior of formal variables inside a
metod or proc:


> irb(main):020:0> a=proc { |i| p i.id;i=7;p i.id}
> => #<Proc:0x4028b604@(irb):20>
> irb(main):021:0> b=5
> => 5
> irb(main):022:0> b.id
> => 11
> irb(main):023:0> a.call(b)
> 11
> 15
> => nil
> irb(main):024:0> b.id
> => 11

I google this and in the faq warn about it, calling it formal variables.

Ok, if I want to change the value of a Array i can use Array#replace, 
but is a way to change other types, Fixnum for example.
Is any way to do this??

Thanks in advance,
  Angel