From: "David A. Black" <dblack@...>
Date: 2007-02-26T10:52:20+09:00
Subject: Re: define an each iterator, etc.

Hi --

On 2/25/07, Guillaume Nargeot
<guillaume.nargeotDONOTSPAM@fusionsystems.co.jp> wrote:
> I would like to know if it's possible to define iterators like each for a
> class you have written ?

Sure. And if you define each and include Enumerator, you get all sorts
of methods along with it (find, select, inject, etc.).

> Is it also possible to write methods that can have the following
> behavior/usage:
>
> object.method do |var|
>   # something
> end

Yes; such a method is called an iterator :-)

  def object.m
    yield 10
  end

  object.m do |var|
    # var is equal to 10
  end

Have a look in any Ruby tutorial book for more.


David

-- 
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