獲取兩個數組的相同元素

第一種

    let arr1 = [1,2,3,4,5,6];
    let arr2 = [4,5,6,8,9,10];

    let result = new Array();
    let c = arr2.toString();

    //獲取兩個數組的相同元素
    for (var i = 0; i < arr1.length; i++) {
        if (c.indexOf(arr1[i].toString()) > -1) {
            for (var j = 0; j < arr2.length; j++) {
                if (arr1[i] == arr2[j]) {
                    result.push(arr1[i]);
                    break;
                }
            }
        }
    }

  console.log(result)

第二種

var arr1 = [0,1,2,3,4,5];
var arr2 = [0,4,6,1,3,9];
function getArrEqual(arr1, arr2) {
    let newArr = [];
    for (let i = 0; i < arr2.length; i++) {
      for (let j = 0; j < arr1.length; j++) {
        if(arr1[j] === arr2[i]){
          newArr.push(arr1[j]);
        }
    }
   }
   return newArr;
}
console.log(getArrEqual(arr1, arr2));
 //輸出：(4) [0, 4, 1, 3]