Day 11: Higher Order Functions Part 2

Lesson 3: every

Given what some() does you might be able to guess what every() does.

It tests to see if every item in an array returns true for the function you give it.

So using our car example again, lets see if every car has a top speed above 100 and then above 150.

<h1>Hello World<h1>

const cars = [
    {model: "Vantage", topSpeed: 230},
    {model: "Juke", topSpeed: 130},
    {model: "5 Series", topSpeed: 190},
];

const allCarsAreUsable = cars.every((car) => car.topSpeed > 100);
console.log(allCarsAreUsable);

const allCarsAreFast = cars.every((car) => car.topSpeed > 150);
console.log(allCarsAreFast);

Again, we get true and then false but this time it's because every element returns true for car.topSpeed > 100 but not every car returns true for car.topSpeed > 150