From: Wes Gamble <weyus@...>
Date: 2006-07-13T02:46:13+09:00
Subject: Re: Determining a class's ancestor easily without instances

Joel VanderWerf wrote:
> Wes Gamble wrote:
>> Given two classes A and B, I know that I can loop through the 
>> superclasses of A to determine it it's a descendant of B.
>> 
>> Is there a more expedient way to do this - something like "is_a?" but at 
>> the class level (since is_a? is for objects)?
> 
> if A < B
>    ###
> end
> 
> if A <= B
>    ###
> end
> 
> [A, B].sort

So is "<" the "superclass" assignment operator?  Is it a method?

Seems like it operates differently in two contexts.  It assigns in a 
class declaration, but evaluates in a logical expression?

Am I understanding correctly?

Wes


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