Arrange Javascript Arrays

Question

I have array of cars and an array of price corresponding to each car.

I want to implement the function highest3 which will return an array of 3 cars in order by their p

Answer 1

Here is a solution for you. First of all it creates an array of objects which represent the cars and their associated values (joinCarPrices).

Then we perform a sort, using the custom sorting function priceSort by using the Array#sort function. Which sorts the cars based on the algorithm you asked for. Lastly, we use Array#slice to only have the 3 highest prices cars.

var cars = ["Ferrari", "Lamborghini", "Jaguar", "Hummer", "Toyota"],
price = [12, 34.5, 3.54, 45.9, 3.44],
result,
joinCarPrices = function () {
    var index = 0,
        carPrices = [];

    for (index = 0; index < cars.length; index++) {
        carPrices[index] = {
            'car': cars[index],
            'price': price[index]
        };
    }

    return carPrices;
},
priceSort = function (a, b) {
    // If the first car is less than the second car
    if (a.price < b.price) {
        return 1;
    } else if (a.price > b.price) {
        // If the first car is more than the second car
        return -1
    } else {
        // Else sort by the car name
        return a.car < b.car ? -1 : 1;
    }
};

cars = joinCarPrices(); // Join the Cars/Prices together as Objects, into an array
result = cars.sort(priceSort); // Sort the Cars based on the Price Sort function
result = result.slice(0, 3); // Slice to only give us array items 0-3
console.log(result);

And heres a JSFiddle showing it working!