JSFiddle - React, Tailwind, and code Playground

by Jessie Lau

JavaScript

function every(arr) {
    for (var i = 0; i < arr.length; i++) {
        if (!isNaN(arr[i])) {
            return false;
        }
    }
      return true;
}

console.log(every([NaN, NaN, NaN], isNaN));
console.log(every([NaN, NaN, 4], isNaN));