Enumerator#next

[Anthony]

It would be fantastic if JS.Enumerator supported an internal current
iteration index a la http://www.ruby-doc.org/core-1.9.3/Enumerator.html#next-method

Doesn't look like it does, though... Am I wrong?

[James Coglan]

On 11 January 2012 01:55, Anthony <draft...@gmail.com> wrote:

It would be fantastic if JS.Enumerator supported an internal current
iteration index a la http://www.ruby-doc.org/core-1.9.3/Enumerator.html#next-method

I don't think this is possible. In Ruby you can do:

class Foo

  include Enumerable

  def each

    yield 3

    yield 2

    yield 1

  end

end

And it knows how to 'pause' the method after a yield and resume next time you call #next. There's no way to simulate this in JavaScript without using generators, which aren't widely supported.

[Anthony Rowlands]

Interesting... I looks like Iterators and Generators were introduced to JavaScript in version 1.7 (2008!). And support is still so poor that you haven't used them? How lame...

[Anthony Rowlands]

Have you seen this?

http://stackoverflow.com/questions/2644966/javascript-iterator-class