Re: Ruby doesn't implement x++ for Fixnum's because ???

On Fri, Oct 30, 2009 at 1:51 PM, lith <minilith@xxxxxxxxx> wrote:
IMHO the story goes like this: absence of postfix ++ and -- is a
consequence of the fact that numeric types are immutable in Ruby which
makes an assignment necessary for these operators.

You could "decorate" it with such a method though. This could look
something like this:

   class FixNum < BasicObject

       def initialize(fn)
           @fn = fn
       end

       def succ!
           @fn += 1
       end

       def method_missing(*args, &block)
           @fn.send(*args, &block)
       end

Hi lith,

can you extol your knowledge on me about what method_missing is doing?
I get what *args and &block is, but not quite sure what's going on?

   end

   a = FixNum.new(1)
   a.succ!
   p a
   => 2

Whether this is good practice or marginally useful ...





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Kind Regards,
Rajinder Yadav

http://DevMentor.org

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