From: Ryan Davis <ryand-ruby@...>
Date: 2013-04-24T07:29:40+09:00
Subject: Re: BEGINNER -CLASS QUERY


On Apr 22, 2013, at 06:52 , Jesús Gabriel y Galán <jgabrielygalan@gmail.com> wrote:

> On Mon, Apr 22, 2013 at 3:45 PM, shaik farooq <lists@ruby-forum.com> wrote:
>> HEY as we know that the object conatins the instance variables that are
>> defined in the class
> 
> In statically typed languages, you have to declare the types of
> variables. Instance variables are one example, and are defined in the
> class typically.

This has nothing to do with static typing vs dynamic typing as it isn't a typing issue. Smalltalk is dynamically typed and you have to declare the instance variables for a class at class definition time. You don't declare the _types_, just the names. This makes ivar access in smalltalk much faster than ivar access in ruby (array offset vs hash lookup).