Javascript check if array value exists in object value

Question

I have an array of cars and I need to check if the car exists in the object.

const cars = ["mustang", 'sonata']; const carsObj = { ford: "mustang", audi: 'r8', tesla: 'model 3' }; 

What i did so far was to check but I only know how to do it with the first element in the array exists in the object. I am looking for the fastest way to this if possible.

carsObj[Object.keys(carsObj).find(key => carsObj[key] === cars[0])]; 

This should return mustang because it is in the array and the object

Instead of checking cars [0] I need to check the entire array. Also, the array would never be that big. Maybe 5 elements the most. Is it better to loop thru the array of the object?

Answer 1

Use includes() to search the whole array instead of just checking the first element.

Also, you can use Object.values() instead of Object.keys(), so you get the values directly, rather than having to write carsObj[key]

const cars = ["mustang", 'sonata']; const carsObj = { ford: "mustang", audi: 'r8', tesla: 'model 3' }; console.log(Object.values(carsObj).find(val => cars.includes(val)))

Answer 2

you need just values of your object not keys:

let values = Object.values(carsObj); 

it will give you array of values => [ mustang,r8,model 3] then use forEach method

cars.forEach((car)=> { const found = values.find((value)=> value === car) }