length property

@override int get length

The number of elements in this Iterable.

Counting all elements may involve iterating through all elements and can therefore be slow. Some iterables have a more efficient way to find the number of elements. These must override the default implementation of length.

Implementation

@override
int get length => _disjoint
    ? _sets.fold(0, (length, set) => length + set.length)
    : _iterable.length;