How can I iterate through two lists in parallel in Dart?

Question

I have two lists that I have confirmed are the same length. I want to operate on them at the same time. My code currently looks something like this:

var a = [1, 2, 3];
var b = [4, 5, 6];
var c = [];
for(int i = 0; i < a.length; i++) {
  c.add(new Foo(a, b));
}

It seems a bit clunky to count up to the length of list A in this fashion. Is there a nicer and more Dart-y way of accomplishing this task?

Answer 1

Take a look at the quiver package's zip function.

You could write this as:

var a = [1, 2, 3];
var b = [4, 5, 6];
var c = [];
for (var pair in zip([a, b])) {
  c.add(new Foo(pair[0], pair[1]));
}

Answer 2

Now that we have list comprehensions in dart:

final c = [for(int i = 0; i<a.length; i+= 1) Foo(a[i], b[i])];