/**
* Fast iterator over entries (it can reuse entry objects).
*
* @param state The state of entries to iterate.
* @return a fast iterator over all key/value pairs
* @see it.unimi.dsi.fastutil.longs.Long2DoubleMap.FastEntrySet#fastIterator()
* Long2DoubleMap.FastEntrySet.fastIterator()
* @since 0.11
*/
public Iterator<VectorEntry> fastIterator(VectorEntry.State state) {
IntIterator iter;
switch (state) {
case SET:
iter = keys.activeIndexIterator(isMutable());
break;
case UNSET:
{
iter = keys.clone().invert().activeIndexIterator(false);
break;
}
case EITHER:
{
iter = IntIterators.fromTo(0, keys.domainSize());
break;
}
default: // should be impossible
throw new IllegalArgumentException("invalid entry state");
}
return new FastIterImpl(iter, state);
}
/**
* Get the set of unset keys. This is \(D \\ S\), where \(D\) is the key domain and \(S\) the key
* set.
*/
public LongSortedSet unsetKeySet() {
return keys.clone().invert().activeSetView();
}