Re: How to use Enumerator::Generator in Ruby 1.9.2

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From	Joey Zhou <yimutang@gmail.com>
Newsgroups	comp.lang.ruby
Subject	Re: How to use Enumerator::Generator in Ruby 1.9.2
Date	Tue, 19 Apr 2011 21:23:57 -0500
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May I think like this, Enumerator.new is a short way, including two
steps:

eg = Enumerator::Generator.new {|y| y << 1 }
p eg # #<Enumerator::Generator:0xb44890>
e1 = Enumerator.new(eg)
p e1 # #<Enumerator: #<Enumerator::Generator:0xb44890>:each>

e2 = eg.to_enum
p e2 # #<Enumerator: #<Enumerator::Generator:0xb44890>:each>

so ruby-doc says there are two forms of Enumerator.new:

Enumerator.new(obj, method = :each, *args)
Enumerator.new { |y| ... }

in fact, there's just one, the second one can be regarded as

Enumerator.new(enum_generator_instance)

Does Enumerator::Generator exist, because Ruby 1.8 has a Generator
class?

-- 
Posted via http://www.ruby-forum.com/.

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Thread

How to use Enumerator::Generator in Ruby 1.9.2 Joey Zhou <yimutang@gmail.com> - 2011-04-19 01:43 -0500
  Re: How to use Enumerator::Generator in Ruby 1.9.2 Robert Klemme <shortcutter@googlemail.com> - 2011-04-19 02:44 -0500
    Re: How to use Enumerator::Generator in Ruby 1.9.2 Johannes Held <johannes.held@informatik.uni-erlangen.de> - 2011-04-19 12:55 +0200
      Re: How to use Enumerator::Generator in Ruby 1.9.2 Robert Klemme <shortcutter@googlemail.com> - 2011-04-19 07:01 -0500
  Re: How to use Enumerator::Generator in Ruby 1.9.2 Joey Zhou <yimutang@gmail.com> - 2011-04-19 07:49 -0500
    Re: How to use Enumerator::Generator in Ruby 1.9.2 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-19 12:36 -0500
  Re: How to use Enumerator::Generator in Ruby 1.9.2 Joey Zhou <yimutang@gmail.com> - 2011-04-19 21:23 -0500

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