No overview available.
SDK
- Xcode 10.2–10.2Deprecated
Framework
- Swift Standard Library
Declaration
func flatMap<ElementOfResult>(_ transform: ((key: Key, value: Value)) throws -> ElementOfResult?) rethrows -> [ElementOfResult]
Generic Instance Methodflat
flatMap(_:)
See Also
Transforming a Dictionary
func mapValues <T>((Value) -> T) -> Dictionary<Key, T>Returns a new dictionary containing the keys of this dictionary with the values transformed by the given closure.
func reduce<Result>(Result, (Result, (key: Key, value: Value)) -> Result) -> ResultReturns the result of combining the elements of the sequence using the given closure.
func reduce<Result>(into: Result, (inout Result, (key: Key, value: Value)) -> ()) -> ResultReturns the result of combining the elements of the sequence using the given closure.
func map<T>(((key: Key, value: Value)) -> T) -> [T]Returns an array containing the results of mapping the given closure over the sequence’s elements.
func compactMap <ElementOfResult>((( key: Key, value: Value)) -> ElementOfResult?) -> [ElementOfResult] Returns an array containing the non-nil results of calling the given transformation with each element of this sequence.
func compactMapValues <T>((Value) -> T?) -> Dictionary<Key, T>Returns a new dictionary containing only the key-value pairs that have non-nil values as the result of transformation by the given closure.
func flatMap <SegmentOfResult>((( key: Key, value: Value)) -> SegmentOfResult) -> [SegmentOfResult.Element] Returns an array containing the concatenated results of calling the given transformation with each element of this sequence.
func sorted(by: ((key: Key, value: Value), (key: Key, value: Value)) -> Bool) -> [(key: Key, value: Value)]Returns the elements of the sequence, sorted using the given predicate as the comparison between elements.
func shuffled() -> [(key: Key, value: Value)]Returns the elements of the sequence, shuffled.
func shuffled<T>(using: inout T) -> [(key: Key, value: Value)]Returns the elements of the sequence, shuffled using the given generator as a source for randomness.