From: dblack@...
Date: 2006-12-22T23:11:56+09:00
Subject: Re: class method

Hi --

On Fri, 22 Dec 2006, Peter Szinek wrote:

>
>>> irb(main):005:0> a.class.is_a? A
>>> => false
>> this still confuses me!
>
> a 'is-an' A. you ask for this with
>
> a.is_a? A
>
> When you are asking
>
> a.class.is_a? A
>
> that actually means 'A.class is_a? A' which is not true since A.class is
> Class.

That's not quite right.  a.class doesn't test A.class; it tests A.  So
this:

   a.class.is_a? A

is the same as:

   A.is_a? A

which is not true.


David

-- 
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