spread.js

// ! Examples
const product = {
  name: "Smartphone",
  brand: "Apple",
  model: "iPhone 12 Pro",
  price: 999,
  color: "Space Gray",
  storage: "256GB",
  inStock: true,
  branch: {
    address: "Time square",
    city: "New York",
  },
};

const prices = [
  19.99, 29.99, 39.99, 49.99, 59.99, 69.99, 79.99, 89.99, 99.99, 149.99,
];
const prices2 = [
  22.99, 33.99, 39.99, 13.99, 59.99, 26.99, 86.99, 56.99, 34.99, 52.99,
];

// ! Spread
const allPrices = [...prices,...prices2]

console.log(allPrices);

const discountProduct = { ...product };
console.log("before changes", { discountProduct, product });
discountProduct.model = "iPhone 14 Pro Max";
discountProduct.branch.city = "Boston";

console.log("after changes", { discountProduct, product });
! Rest
const sum = (...numbers) => {
  console.log({ numbers });
  return numbers.reduce((acc, current) => acc + current, 0);
};

console.log(sum(10, 15, 33, 22, 66, 34, 75));


// ! Destruction
const {model, brand, ...rest} = product;
console.log(model, brand,rest);

const [first, second, ...rest1] = prices;

console.log(first, second,rest1);


const deepCopy = (obj) => {
  let copy = {};
  if (obj === null || typeof obj !== "object") {
    return obj;
  }
  if (obj instanceof Object) {
    copy = {};
    for (let key in obj) {
      if (obj.hasOwnProperty(key)) {
        copy[key] = deepCopy(obj[key]);
      }
    }
    return copy;
  }
};

const deepCopyObject = deepCopy(product);
console.log("Before", { deepCopyObject, product });
deepCopyObject.branch.city = "Boston";
console.log("After", { deepCopyObject, product });