From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-10-10T09:28:19+09:00
Subject: Re: Backporting Enumerator.new { ... } to Ruby 1.8.7

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James Edward Gray II:

> Shot (Piotr Szotkowski) wrote:

>>>> What is the sanest way to backport the following example so that it
>>>> works more-or-less in the same way under Ruby 1.8.7 as it does under
>>>> Ruby 1.9?

>>>> def multiplier param
>>>>  Enumerator.new do |yielder|

> require "generator"

[=E2=80=A6]

> Or with a closure:

[=E2=80=A6]

> Or with an object:

[=E2=80=A6]

> I forgot to mention, there are some
> other good resources for code like this:
> http://moonbase.rydia.net/software/lazy.rb/
> http://blog.grayproductions.net/articles/infinite_streams

Thanks a lot, James! As I just wrote in the reply to Roger Pack,
I ended up using the backports gem, and if I didn=E2=80=99t know about it
I=E2=80=99d most probably expose Generator.new as Enumerator.new, but the
closure and object examples are very enlightening.

Even more so is your =E2=80=98Higher-Order Ruby=E2=80=99 series, which I al=
ways split
into the =E2=80=98understandable=E2=80=99 part on Iterators, Caching and Me=
moization,
and the =E2=80=98still a bit over my head=E2=80=99 rest.

I think I=E2=80=99m finally ready to dive deep and wrap my
head around all of the concepts mentioned there. :)

=E2=80=94 Shot
--=20
Blore=E2=80=99s Razor: Given a choice between two
theories, take the one which is funnier.

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