some method to check an array in JavaScript

The following method some checks the array elements and returns true if the callback returned true for at least one element, otherwise the method returns false.

Let's check, for example, that there is at least one even number in the array:

javascriptlet arr = [2, 4, 6, 8];

let result = arr.some(function(elem) {
  return elem % 2 == 0;
});

console.log(result);

Let's simplify:

javascriptlet arr = [2, 4, 6, 8];

let result = arr.some(elem => elem % 2 == 0);
console.log(result);