From: MonkeeSage <MonkeeSage@...>
Date: 2007-12-03T11:10:06+09:00
Subject: Re: Generator#yield - what does it do?

On Dec 2, 5:03 pm, Wolfgang Nádasi-Donner <ed.oda...@wonado.de> wrote:
> Hi!
>
> I am confused somehow with respect to "Generator#yield". The description
> (ri) is...
>
> >ri Generator#yield
>
> -------------------------------------------------------- Generator#yield
>      yield(value)
> ------------------------------------------------------------------------
>      Yields an element to the generator.
>
> It's unclear for me what this means. I would expect that the Generator
> object delivers (yields) values by requirement through
> "Generator#current" or "Generator#next", but what should be yielded to
> an already existing Generator object?
>
> Wolfgang Nádasi-Donner
> --
> Posted viahttp://www.ruby-forum.com/.

It's for passing items *into* the generator's queue when the generator
is created with the block form of Generator#new rather than from an
existing enumerable. Example...

require 'generator'
g = Generator.new { | g |
  1.upto(9) { | i |
    g.yield(i)
  }
  g.yield(10)
}
until g.end?
  p g.next
end

It probably should be spelled "inject" or something.

Regards,
Jordan