RandomUnification.swift

let double = Double.random(in: -1.2...4.5)
let integer = Int.random(in: .min ... .max)
let unsignedInteger = UInt.random(in: 4...9)
let bool = Bool.random()

var generator = SystemRandomNumberGenerator()
let double2 = Double.random(in: 1.0..<4.2, using: &generator)

let array = ["Cat", "Cow", "Dog", "Sheep"]
if let element = array.randomElement() {
    print(element) // e.g Dog
}

let shuffled = array.shuffled()
print(array, shuffled) // e.g ["Cat", "Cow", "Dog", "Sheep"] ["Dog", "Cow", "Sheep", "Cat"]