JS_Diff Two Arrays

• 문제

  Compare two arrays and return a new array with any items only found in one of the two given arrays, but not both.

  • 예시

  diffArray(["andesite", "grass", "dirt", "pink wool", "dead shrub"], ["diorite", "andesite", "grass", "dirt", "dead shrub"]) // should return ["diorite", "pink wool"].
  

   

• 내가 푼 답

  function diffArray(arr1, arr2) {
    return [...arr1.filter(n => arr2.indexOf(n) === -1), ...arr2.filter(n => arr1.indexOf(n) === -1)]; 
  }
  

   

• Advanced Solution

  function diffArray(arr1, arr2) {
      return arr1
        .filter(el => !arr2.includes(el))
        .concat(
          arr2.filter(el => !arr1.includes(el))
        )
  }