[ruby-core:18129] Re: Enumerators that know about a block

Hi --

I don't usually "bump" questions but this one got kind of drowned out
by the choice/rand/sample discussion :-)

I'm really curious about it, and it's still not making sense to me.


David

On Fri, 1 Aug 2008, David A. Black wrote:

> Hi --
>
> I'm remembering that at one point it was possible to do this:
>
>  array = [1,2,3]
>  func = lambda {|x| x * 10 }
>  e = array.enum_for(:map, &func)
>  e.next
>  => 10
>
> But now the result is 1, because &func is ignored.
>
> I'm (a) puzzled by this, since it seems to me that enumerators are
> much more useful if they can remember a block, and (b) wondering if
> there's some similar replacement technique that I haven't managed to
> figure out.
>
>
> David
>
> -- 
> Rails training from David A. Black and Ruby Power and Light:
> *  Advancing With Rails    August 18-21    Edison, NJ
> * Co-taught by D.A. Black and Erik Kastner
> See http://www.rubypal.com for details and updates!
>

-- 
Rails training from David A. Black and Ruby Power and Light:
  *  Advancing With Rails    August 18-21    Edison, NJ
  * Co-taught by D.A. Black and Erik Kastner
See http://www.rubypal.com for details and updates!