How to return boolean in an Array.prototype function?

March 19, 2022

Im trying to maken a function to use the AND-Logicgate but it only respons an array.
I tryed useing toString() and join() but they dont work. Can anybody help me.

Here is the Code:

Array.prototype.AND = function() {
  var temp = true;
  for (let i = 0; i < this.length; i++) {
    if (this[i] == false) {
      temp = false;
    }
  }
  while (this.length > 0) {
    this.pop();
  }
  this[0] = temp;
}

const test = [true, true, true, false];

test.AND();

console.log(test);

>Solution :

So if the array contains a false, the prototyped function .AND should return false.

Use some to determine if the array contains a false.

const test = [true, true, true, false];
const test2 = [true, true, true, true];

Array.prototype.AND = function() {
  return !this.some(item => item == false)
}

console.log(test.AND())   // false
console.log(test2.AND())  // true