How to search array of arrays with JavaScript?

To search array of arrays with JavaScript, we use the array some and every methods.

For instance, we write

const ar = [
  [2, 6, 89, 45],
  [3, 566, 23, 79],
  [434, 677, 9, 23],
];

const val = [3, 566, 23, 79];

const bool = ar.some((arr) => {
  return arr.every((prop, index) => {
    return val[index] === prop;
  });
});

to call some with a callback that searches every element of the nested array to check if they're equal with every.

We call every with a callback that check the index of arr to see if it's equal to prop in the nested array.