zip3<T1, T2, T3> function
Implementation
Iterable<Tuple3<T1, T2, T3>> zip3<T1, T2, T3>(
Iterable<T1> it1, Iterable<T2> it2, Iterable<T3> it3) sync* {
final iter1 = it1.iterator;
final iter2 = it2.iterator;
final iter3 = it3.iterator;
var keep_running = true;
while (keep_running) {
final move1 = iter1.moveNext();
final move2 = iter2.moveNext();
final move3 = iter3.moveNext();
final all_true = move1 && move2 && move3;
final all_false = !move1 && !move2 && !move3;
assert((all_true || all_false), 'iteration length must be equal');
if (all_true) {
yield Tuple3<T1, T2, T3>(iter1.current, iter2.current, iter3.current);
}
keep_running = all_true;
}
}