Filter through an array in javascript

Question

I have one array with a list of all cars, as follows :

const allCars = [

       {id: 1, listID: 1, name: "Car 1", chassis: "000000000"},

       {id: 2, listID: 2, name: "Car 2", chassis: "111111111"},

       {id: 3, listID: 1, name: "Car 3", chassis: "222222222"},

       {id: 4, listID: 1, name: "Car 4", chassis: "333333333"}

    ];

and I have some of those cars in the shopping cart, as follows :

const carsInCart = [

           {carID: 1, listID: 1, offer: 488},

           {carID: 2, listID: 2, offer: 786},

        ]

Is there any way to filter throught allCars and return only those which are in carsInCart, and return only chassis from allCars and offer from carsInCart?

Thus, what I want is something like this :

const result = [

   {chassis: 000000000, offer: 488},

   {chassis: 111111111, offer: 786}

]

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Answer 1

Just try with:

const result = carsInCart.map(function (car) {
  const aCar = allCars.find(function (c) {
    return c.id === car.ID;
  });
  return { chassis: aCar.chassis, offer: car.offer };
});

Or with functions shorthands:

const result = carsInCart.map(car => {
  chassis: allCars.find(c => c.id === car.ID).chassis,
  offer:   car.offer
});

Filter through an array in javascript

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