Everything comes to him who waits

//
//  main.swift
//  Ultimate
//
//  Created by Mewlan Musajan on 4/23/21.
//
//Excerpt From: Apple Inc. “The Swift Programming Language (Swift 5.3).” Apple Books. https://books.apple.com/us/book/the-swift-programming-language-swift-5-3/id881256329

struct IntStack {
    var items = [Int]()
    mutating func push(_ item: Int) {
        items.append(item)
    }
    @discardableResult
    mutating func pop() -> Int {
        return items.removeLast()
    }
}

var someIntStack = IntStack()
someIntStack.items = [1, 2, 3, 4]
someIntStack.pop()
print(someIntStack.items)