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From: 7stud -- <bbxx789_05ss@yahoo.com>
Newsgroups: comp.lang.ruby
Subject: Re: How to use Enumerator::Generator in Ruby 1.9.2
Date: Tue, 19 Apr 2011 12:36:55 -0500
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Joey Zhou wrote in post #993744:
> e = Enumerator.new do |y|
>   y << 1
> end
>
> p e #=> #<Enumerator: #<Enumerator::Generator:0x1345b00>:each>
>
> well, it seems that e is an Enumerator, but has an Enumerator::Generator
> in it. I am confused what on earth Enumerator::Generator is.
>

It's that y thing, and it knows how to provide values to the enumerator 
when your code requests values from the enumerator.


> Can I get
> an object that can return "Enumerator::Generator" if I type "obj.class"?
>

Let's see:

1)
obj = Enumerator::Generator.new
puts obj.class

--output:--
prog.rb:1:in `initialize': no block given (LocalJumpError)
  from prog.rb:1:in `new'
  from prog.rb:1:in `<main>'

2)
obj = Enumerator::Generator.new do |y|
  y << 1
end

puts obj.class

--output:--
Enumerator::Generator

There you go.

-- 
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