withBase method
void
withBase(
- _SetFactory<
E> base
Uses base
as the collection type for all sets created by this builder.
// Iterates over elements in ascending order.
new SetBuilder<int>()..withBase(() => new SplayTreeSet<int>());
// Uses custom equality.
new SetBuilder<int>()..withBase(() => new LinkedHashSet<int>(
equals: (int a, int b) => a % 255 == b % 255,
hashCode: (int n) => (n % 255).hashCode));
The set returned by base
must be empty, mutable, and each call must
instantiate and return a new object. The methods difference
,
intersection
and union
of the returned set must create sets of the
same type.
Use withDefaultBase to reset base
to the default value.
Implementation
void withBase(_SetFactory<E> base) {
ArgumentError.checkNotNull(base, 'base');
_setFactory = base;
_setSafeSet(_createSet()..addAll(_set));
}