From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-03-21T18:23:11+09:00
Subject: Re: Strong advantages over Python

On Fri, Mar 21, 2003 at 05:54:00PM +0900, Lennon Day-Reynolds wrote:
> The specific difference I was trying to illustrate was the ability to, 
> in Ruby, add a method to an existing class, and have that change then 
> cascade through to each instance of the class. To use a trivial example, 
> if I were to add an 'average' method to the array method like so...
> 
> class Array
>    def average
>       sum = 0.0
>       self.each {|i| sum += i}
>       sum / self.size
>    end
> end
> 
> ...any existing instances of Array would then have this method 
> available. In Python, however, I would have to re-define/load the class, 
> then re-instantiate any objects of that type in order to access the new 
> instance method.

This isn't what can be inferred from http://www.ruby-talk.org/67397.

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