lexicographical property
Comparator<Iterable<T> >
lexicographical
Returns a Comparator that orders iterables of type T
lexicographically
by their elements.
Implementation
Comparator<Iterable<T>> get lexicographical => (a, b) {
final ia = a.iterator, ib = b.iterator;
while (ia.moveNext()) {
if (!ib.moveNext()) {
return 1;
}
final result = this(ia.current, ib.current);
if (result != 0) {
return result;
}
}
return ib.moveNext() ? -1 : 0;
};