No overview available.
SDK
- Xcode 10.2–10.2Deprecated
Framework
- Swift Standard Library
Declaration
func flatMap<ElementOfResult>(_ transform: (Element) throws -> ElementOfResult?) rethrows -> [ElementOfResult]
Generic Instance Methodflat
flat
See Also
Transforming an Array
func map<T>((Element) -> T) -> [T]Returns an array containing the results of mapping the given closure over the sequence’s elements.
func flatReturns an array containing the concatenated results of calling the given transformation with each element of this sequence.
func compactReturns an array containing the non-nil results of calling the given transformation with each element of this sequence.
func reduce<Result>(Result, (Result, Element) -> Result) -> ResultReturns the result of combining the elements of the sequence using the given closure.
func reduce<Result>(into: Result, (inout Result, Element) -> ()) -> ResultReturns the result of combining the elements of the sequence using the given closure.
var lazy: LazyA sequence containing the same elements as this sequence, but on which some operations, such as map and filter, are implemented lazily.