binaryToInteger

binaryToInteger.js

// you can write to stdout for debugging purposes, e.g.
// console.log('this is a debug message');

function binaryToInteger(A) {
  let sum = 0;
  for (let i = 0; i < A.length; i++) {
    sum += A[i] * Math.pow(-2, i);
  }

  return sum;
}

function integerToNegativeBinary(n) {
  const mask = 0xAAAAAAAA;
  return ((n + mask) ^ mask).toString(2);
}

function solution(A, B) {
  const a = binaryToInteger(A);
  const b = binaryToInteger(B);
  const sum = a + b;
  const result = integerToNegativeBinary(sum).split("").reverse().map((item) => {
    return parseInt(item);
  })

  return result;
}

console.log('solution: ', solution([0, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1], [0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1]));