Ranges and/versus iterators

[Igor Lesik]

>Can someone please explain in plain words just exactly what a range is and how
>it differs from the iterator concept (if that's appropriate???) and what are the benefits
>from a data modeling and access perspective.

Check Andrei's presentation "Iterators must go":
http://www.slideshare.net/rawwell/iteratorsmustgo

I am interested myself to know how ranges
are envisioned to be in D. Does the book talk
about ranges?