From: David Alan Black <dblack@...>
Date: 2001-11-30T21:32:49+09:00
Subject: [ruby-talk:27057] Re: Using Enumerable

Hello --

On Fri, 30 Nov 2001, Peter Hickman wrote:

> Just how do you write an each method?

Your each method has to yield values as it iterates.

  class Thing
    include Enumerable
    def each
      i = 0
      while i < 5
	yield i
	i += 1
      end
    end
  end

  Thing.new.each do |n| puts "Next value: #{n}" end

  # Output:

  Next value: 0
  Next value: 1
  Next value: 2
  Next value: 3
  Next value: 4


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav