I have a shopping cart with an apple and and orange object. I want to be able to add the apple twice, but I'm not sure how to target the "fruit1" object twice, in order to display 2 apples in the cart. I essentially want to update the cart array with "2 apples", with the price "value" doubled, and 1 orange)

module.exports = {
    shoppingCart: function () {
        //create empty cart array
        theCart = [];
        // all fruits
        let fruitProducts = [
            {
                "fruit1": "Apple",
                "price": 4.95,

            },
            {
                "fruit2": "Orange",
                "price": 3.99
            },
        ]
        //push the objects into the empty array using the apply method -- add items to the cart
        Array.prototype.push.apply(theCart, fruitProducts);

        //remove items from the cart by calling this function
        function removeAllItems() {
            if (theCart.length = !0) {
                theCart = [];
            }
        } 
        //removeAllItems();  


        console.log(theCart);
    }
}

CodePudding user response：

Use .map(). Add property qty and total and pass a spread of numbers (...amounts ex. 1, 2, 5)representing the quantities of each item.

const fruit = [{
    "fruit": "Apple",
    "price": 4.95
  },{
    "fruit": "Orange",
    "price": 3.99
  }
];

const shop = (product, ...amounts) => {
  const pro = product.length;
  let amt = [...amounts].length;
  let qty =  pro - amt > 0 ? [...amounts].fill(0, amt -1, (amt - 1)   (pro - amt)) : pro - amt < 0 ? [...amounts].length   (pro - amt) : [...amounts];
  
  let cart = product.map((item, count) => {
    item.qty = qty[count];
    item.total = (parseFloat(item.qty) * parseFloat(item.price)).toFixed(2);
    return item;
  });
  return cart;
};
  
console.log(shop(fruit, 1, 3));

  

CodePudding user response：

It seems like you are asking how to find an object from an array and then copy it.

First, to find fruit1:

const apple = fruitProducts.find(fruit => “fruit1” in fruit);

Next, to push copies of that object to your cart you can use the spread operator to do a shallow copy:

theCart.push(…apple);
theCart.push(…apple);

That being said, a better solution is to keep a list of objects whose properties are fruit, quantity, and price. Then you can compute total price once you are done adding items to the cart.