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Groups > comp.lang.ruby > #2855

Re: Calling to_enum on a MatchData object

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> Posted by Robert K. (robert_k78) on 2011-04-13 13:45

> The logic is a bit tricky. :-)  The Enumerator::Generator is just
> something which can enumerate something.  There is no infinite loop
> until you start iterating that instance via #each or any other method
> defined in Enumerable.  Actually the loop is "interrupted" every time
> "y << num" is invoked.
>

OK. So I guess this syntax:

e = Enumerator.new do |y|
  (0..9).cycle do |num|
    y << num
  end
end

Is more declarative in that it just declares an enumerator without 
setting off the infinite loop inside. To execute the loop one needs 
something like:

e.take(15)

And then there is no infinite loop either, as the amount of iterations 
is scoped by the argument to take().

Great examples in your post, I appreciate it!

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

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Thread

Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-08 13:19 -0500
  Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-08 14:41 -0500
  Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-08 14:21 -0500
  Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-08 20:09 -0500
  Re: Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-09 07:03 -0500
    Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-09 13:18 -0500
      Re: Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-13 06:14 -0500
    Re: Calling to_enum on a MatchData object Gary Wright <gwtmp01@mac.com> - 2011-04-09 14:25 -0500
      Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-09 17:17 -0500
        Re: Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-13 06:28 -0500
          Re: Calling to_enum on a MatchData object Gary Wright <gwtmp01@mac.com> - 2011-04-13 22:44 -0500
  Re: Calling to_enum on a MatchData object 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-09 14:02 -0500
    Re: Calling to_enum on a MatchData object Robert Klemme <shortcutter@googlemail.com> - 2011-04-13 06:45 -0500
      Re: Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-14 11:13 -0500
    Re: Calling to_enum on a MatchData object Vahagn Hayrapetyan <vahagnh@gmail.com> - 2011-04-13 06:25 -0500

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