Returns the concatenation of the elements in this sequence of sequences, inserting the separator produced by the closure between each sequence.
func joined(by separator: (Element, Element) throws -> Element.Element) rethrows -> [Element.Element] sST10AlgorithmsST7ElementRpzrlE6joined2bySayAB_ABQZGAfC_ACtKXE_tKF What are these?9HYAFwhere Self.Element:Sequencefor x in [[1, 2], [3, 4], [5, 6]].joined(by: { $0.last! * $1.first! }) {
print(x)
}
// 1, 2, 6, 3, 4, 20, 5, 6import Swiftimport AlgorithmsSwift Algorithms is an open-source package of sequence and collection algorithms, along with their related types.
protocol Sequence<Element>A type that provides sequential, iterated access to its elements.
associatedtype Element where Self.Element == Self.Iterator.ElementA type representing the sequence’s elements.
func joined(by separator: Element.Element) -> JoinedBySequence<Self, CollectionOfOne<Element.Element>> Returns the concatenation of the elements in this sequence of sequences, inserting the given separator between each sequence.
func joined(by separator: Element.Element) -> JoinedByCollection<Self, CollectionOfOne<Element.Element>> Returns the concatenation of the elements in this collection of collections, inserting the given separator between each collection.
func joined(by separator: @escaping (Element, Element) -> Element.Element) -> JoinedByClosureCollection<Elements, CollectionOfOne<Element.Element>> Returns the concatenation of the elements in this collection of collections, inserting the separator produced by the closure between each sequence.
func joined<Separator>(by separator: @escaping (Element, Element) -> Separator) -> JoinedByClosureSequence<Elements, Separator> where Separator : Sequence, Separator.Element == Self.Element.Element Returns the concatenation of the elements in this sequence of sequences, inserting the separator produced by the closure between each sequence.
func joined<Separator>(by separator: Separator) -> JoinedBySequence<Self, Separator> where Separator : Collection, Separator.Element == Self.Element.Element Returns the concatenation of the elements in this sequence of sequences, inserting the given separator between each sequence.
func joined<Separator>(by separator: (Element, Element) throws -> Separator) rethrows -> [Element.Element] where Separator : Sequence, Separator.Element == Self.Element.Element Returns the concatenation of the elements in this sequence of sequences, inserting the separator produced by the closure between each sequence.