map swift
// A map example which maps each item in this array of numbers // to its value multiplied by 2. let array = [1, 2, 3, 4] // Full closure print(array.map({ (num: Int) -> Int in return num * 2 })) // Abbreviated trailing closure, with inferred arguments, // argument type, and return type. print(array.map { $0 * 2 }) // Output: [2, 4, 6, 8]