From: "Marcel Molina Jr." <marcel@...>
Date: 2006-02-24T13:07:02+09:00
Subject: Re: Everything's an object, right?

On Fri, Feb 24, 2006 at 12:58:38PM +0900, Nathan Morse wrote:
> def foo(x)
>   x = 'k' + x[1..x.size]
>   x
> end
> 
> def bar(x)
>   x[0] = 'k'
>   x
> end

String#+ creates a new object. String#[] edits the object in place.

def foo(x)
  x = 'k' + x[1..x.size]
  [x, x.object_id]
end

def bar(x)
  x[0] = 'k'
  [x, x.object_id]
end

>> k = 'crazy'
=> "crazy"
>> k.object_id
=> 2584064
>> foo k
=> ["krazy", 2580574]
>> bar k
=> ["krazy", 2584064]
>> foo k
=> ["krazy", 2577004]
>> bar k
=> ["krazy", 2584064]

marcel
-- 
Marcel Molina Jr. <marcel@vernix.org>