JavaScript Array: Checking for multiple values


We are required to write a JavaScript function that takes in two arrays of Numbers and checks whether all the elements of the first array exist in the second or not.

Example

The code for this will be −

const arr1 = [34, 78, 89];
const arr2 = [78, 67, 34, 99, 56, 89];
const multipleIncludes = (first, second) => {
   const indexArray = first.map(el => {
      return second.indexOf(el);
   });
   return indexArray.indexOf(-1) === -1;
}
console.log(multipleIncludes(arr1, arr2));

Output

The output in the console −

true

Updated on: 14-Oct-2020

120 Views

Kickstart Your Career

Get certified by completing the course

Get Started
Advertisements