struct DictionaryIndex<Key : Hashable, Value> Used to access the key-value pairs in an instance of Dictionary<Key, Value>. Dictionary has two subscripting interfaces: Subscripting with a key, yielding an optional value: v = d[k]! Subscripting with an index, yielding a key-value pair: (k,v) = d[i] Inheritance Comparable, Equatable, ForwardIndexType, _Incrementable View Protocol Hierarchy → Import import Swift Instance Methods func advancedBy(_:) Returns the result of advancing self by n positions. Returns: - If n > 0, the result of applying successor to self n times. - If n < 0, the result of applying predecessor to self -n times. - Otherwise, self. Requires: n >= 0 if only conforming to ForwardIndexType Complexity: - O(1) if conforming to RandomAccessIndexType - O(abs(n)) otherwise Declaration func advancedBy(n: DictionaryIndex<Key, Value>.Distance) -> DictionaryIndex<Key, Value> Declared In ForwardIndexType func advancedBy(_:limit:) Returns the result of advancing self by n positions, or until it equals limit. Returns: - If n > 0, the result of applying successor to self n times but not past limit. - If n < 0, the result of applying predecessor to self -n times but not past limit. - Otherwise, self. Requires: n >= 0 if only conforming to ForwardIndexType. Complexity: - O(1) if conforming to RandomAccessIndexType - O(abs(n)) otherwise Declaration func advancedBy(n: DictionaryIndex<Key, Value>.Distance, limit: DictionaryIndex<Key, Value>) -> DictionaryIndex<Key, Value> Declared In ForwardIndexType func distanceTo(_:) Measure the distance between self and end. Requires: - start and end are part of the same sequence when conforming to RandomAccessSequenceType. - end is reachable from self by incrementation otherwise. Complexity: - O(1) if conforming to RandomAccessIndexType - O(n) otherwise, where n is the function's result. Declaration func distanceTo(end: DictionaryIndex<Key, Value>) -> DictionaryIndex<Key, Value>.Distance Declared In ForwardIndexType func successor() Returns the next consecutive value after self. Requires: The next value is representable. Declaration func successor() -> DictionaryIndex<Key, Value>