Going through a book on coding in D,
http://ddili.org/ders/d.en/foreach.html , I find the following
very useful feature:
When two names are specified in the names section [with a plain
array], they represent an automatic counter and the value of the
element, respectively:
foreach (i, element; array) {
writeln(i, ": ", element);
}
I understand that foreach is built on top of a for loop... I'm
just wondering why I can't access the automatic counter from a
doubly linked list, or an associative array, or some range? It's
pretty common for me to have to rewrite foreach loops to be for
loops when I get to the bottom and realize I need to know where
in the sequence I am...
