Swap Function that swaps the values of two variables of any type

Swap.swift

//When it says Any type, this means that we're dealing with generics 

func swap<G>(item_1: inout G, item_2: inout G) {
     let temp = item_1
     item_1 = item_2
     item_2 = temp
}

var one = "1"
var two = "2"
print(one, two) //1, 2
swap(&one, &two)
print(one, two) //2, 1