From: Joel VanderWerf <vjoel@...>
Date: 2009-08-13T05:08:51+09:00
Subject: Re: Class#descendants?

Jason Lillywhite wrote:
> Joel VanderWerf wrote:
>> irb(main):001:0> ObjectSpace.each_object(Class) {|cl| p cl if cl < 
>> Numeric}
> 
> Thank you. Why does it return 387 after I do this in IRB?
> 
> like this:
> irb(main):069:0> ObjectSpace.each_object(Class) {|cl| p cl if cl < Date}
> DateTime
> => 387

It's the number of instances of Class (since that was the argument). So 
another example is:

irb(main):002:0> ObjectSpace.each_object(String) {}
=> 4613

(Yep, the empty block is necessary.)

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407