Liran ushpizin

ushpizin / Permutations.swift

Last active September 8, 2017 08:36 — forked from proxpero/Permutations.swift

Generate the permutations of a Swift array.

	//: Permutations
	// based on https://www.objc.io/blog/2014/12/08/functional-snippet-10-permutations/
	// but updated for Swift 3.0 (Xcode 8.3)

	extension Array {
	func decompose() -> (Generator.Element, [Generator.Element])? {
	guard let x = first else { return nil }
	return (x, Array(self[1..<count]))
	}
	}