Difference between two arrays - solution 2

algo_mid_one_2.js

const arrayOne = [1, 4, 5, 7, 3, 8, 1, 9];
const arrayTwo = [3, 7, 1, 12, 9, 5, 24, 16];

function diffArrayInt(array1, array2) {
  // 1. Create new array
  const newArr = [];
  // 2. Combine the two array and sort
  const orderedArr = [...array1, ...array2].sort();

  // 3. Loop through the ordered Array
  orderedArr.map((item, index) => {
    // 4. If given element is not repeated, it's unique
    if (item !== orderedArr[index - 1] && item !== orderedArr[index + 1]) {
      // 5. Add unique element to the new array
      newArr.push(item);
    }
  });
  // 6. Return the array with unique numbers
  return newArr;
}

console.time('Start Algo 2');
console.log(diffArrayInt(arrayOne, arrayTwo));
console.timeEnd('Start Algo 2'); // Start Algo 2: 0.527099609375ms