From: "Brian Schröder" <ruby.brian@...>
Date: 2005-06-01T02:47:22+09:00
Subject: Re: Operation on Classes

On 31/05/05, aartist <aartist@gmail.com> wrote:
> While learning ruby, I want to study from the perspective of classes.
> 
> Exmaple:
> Given: # Array, Index, Object
> Operations: array[index]  = obj -> obj
> 
> Given: # Two Arrays
> array & other_array    -> an_array
> array + other_array    -> an_array
> array - other_array    -> an_array
> array <=> other_array  ->  -1, 0, +1
> array == other_array   ->   bool
> 
> Given: # Array, Object
> array.push(obj)         -> array
> array << obj            -> array
> 
> etc..
> 
> So the idea is to know, what is possible with given objects of
> different kind.
> 
> Is there any way to generate it?
> 
> 

Maybe I do not understand you correctly, but every object has the
.class function.

$ irb
irb(main):001:0> (Array.new + Array.new).class
=> Array
irb(main):002:0> ([] & []).class
=> Array
irb(main):003:0> ([1,2,3] <=> [])
=> 1
irb(main):004:0> ([1,2,3] <=> []).class
=> Fixnum
irb(main):005:0> ([1,2,3] == []).class
=> FalseClass

regards,

Brian


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