challenge-12.js

// Diff Two Arrays
// Compare two arrays and return a new array with any items only found in one of the two given arrays, but not both. In other words, return the symmetric difference of the two arrays.

// Note: You can return the array with its elements in any order.

// #solution

function diffArray(arr1, arr2) {
  const newArr = [];
  arr1.forEach((item) => {
    if (arr2.indexOf(item) === -1) {
      newArr.push(item);
    }
  });
  arr2.forEach((item) => {
    if (arr1.indexOf(item) === -1) {
      newArr.push(item);
    }
  });
  return newArr;
}

diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]);

// #or

function compareArrays(arr1, arr2) {
  return arr1
    .filter((item) => !arr2.includes(item))
    .concat(arr2.filter((item) => !arr1.includes(item)));
}

console.log(compareArrays([1, 2, 3, 5], [1, 2, 3, 4, 5]));