From: Tom Link <micathom@...>
Date: 2009-02-02T16:07:32+09:00
Subject: Re: ruby string question

> Is it possible to modify an existing ruby string without creating a new
> one ?
> [...]
> between asigning values , the object_id() is different

I could be totally wrong but IMHO you're asking for two different
things.

As soon as you have something like "second string" in your code you
will create a second string. You can assign this to the variable (the
variable's value will have a different object_id) or replace its
content with that string (the variables value will have same object_id
as before but in between you created a second string).

3.times do
    puts "---------"
    x = "one".tap {|s| puts "one #{s.object_id}"}
    p x, x.object_id
    x.replace("two".tap {|s| puts "two #{s.object_id}"})
    p x, x.object_id
end