Generics.swift

import Foundation

// Generics

/* Generic code enables you to write flexible, reusable functions and types that can work with any type, subject to requirements that you define. You can write code that avoids duplication and expresses its intent in a clear, abstracted manner.
 */


// Normal function
func add(first: Int, second: Int) -> Int {
    return first + second
}

add(first: 1, second: 2)


//Generic function
func add<T: Numeric>(first: T, second: T) -> T {
    return first + second
}

add(first: 4.2, second: 2)



// Generic Types - Class
class User<T: Numeric> {
    func addSomething(first: T, second: T) -> T {
        return first + second
    }
}

let user = User<Int>()
user.addSomething(first: 2, second: 3)

let user1 = User<Float>()
user1.addSomething(first: 4.2, second: 3.5)


// Generic Types - Protocols
protocol Doable {
    associatedtype T
    
    var work : T { get set }
    
    func doSomething()
}

class Factory: Doable {
    typealias T = String
    var work: String
    
    init(_ workName: String) {
        self.work = workName
    }
    
    func doSomething() {
       print(work)
    }
}