@swiftbot
func indexed<T>(_ slice: ArraySlice<T>) -> [(Int, T)] { return (0..<slice.count).map { (offset: Int) in (offset, slice[slice.startIndex + offset]) } } let a = ["a", "b", "c", "d", "e", "f", "g"] var b = a[2...4] print(indexed(b)) _ = b.popLast() b.append("h") print(indexed(b)) _ = b.popFirst() b.insert("i", at: 3) print(indexed(b))