Looping through data js

I'm trying to loop through an array of car data and create an array of Car objects using a forEach loop. Then, I want to display each car in the appropriate section of the page depending on whether it is "safetied" or not.

Here’s my Car class:

class Car {
    constructor(manufacturer, model, year, vin, safetied) {
        this.manufacturer = manufacturer;
        this.model = model;
        this.year = year;
        this.vin = vin;
        this.safetied = safetied;
   }

    get outputString() {
        return `${this.manufacturer} ${this.model} ${this.year} with ${this.vin}`;
    }
}

My car data is in a separate file, cardata.js, and looks like this:

let carData = [];
carData.push(["Cadillac","DeVille",1993,"1FTEW1CM7CK070304",true]);
// ... and many more entries in this same array format

Here’s the logic I originally used in parta.js:

let cars = [];

carData.forEach(car => {
    const newCar = new Car(car.manufacturer, car.model, car.year, car.vin, car.safetied);
    cars.push(newCar);
});

But this gave me undefined values or didn't work as expected.

Answer

Your data is stored in an array or arrays:

let carData = [];
carData.push(["Cadillac","DeVille",1993,"1FTEW1CM7CK070304",true]);

But you're looking for named properties on the "inner" arrays:

const newCar = new Car(car.manufacturer, car.model, car.year, car.vin, car.safetied);

An array doesn't have properties like manufacturer or model, etc. It's just an array of values. You'd reference those values by their index in the array:

const newCar = new Car(car[0], car[1], car[2], car[3], car[4]);

Keep in mind of course that using arrays to store data like this requires that you ensure the values are always in the correct order. A mixed array of values is technically valid, but doesn't organize values in human-readable properties like one would with an object.

Arrays should be used for lists of otherwise similar values. Objects should be used for grouping attributes which collectively describe something.