From: gabriele renzi <surrender_itRemove@...>
Date: 2006-07-30T05:50:12+09:00
Subject: Re: to_i vs. to_int

dblack@wobblini.net ha scritto:
> Hi --
> 
>> d>    class S
>> d>      def to_int
>> d>        2
>> d>      end
>> d>    end
>>
>> d>    puts 2 + S.new    # TypeError: S can't be coerced into Fixnum
>>
>>      puts 2 | S.new

also, Arrays seem to like it:
 >> a=Object.new
=> #<Object:0x2c103a0>
 >> def a.to_int() 2 end
=> nil
 >> [0,1,3][a]
=> 3
 >> Array.new(a){ 0 }
=> [0, 0]

> 
> Interesting.  What's the rationale for not doing the conversion for +
> and - and other operator/methods?

I'd like to know the same :)