js 物件-陣列相互轉換

題目:

script 指令碼程式碼

陣列轉物件

<script type="text/javascript">
    function fun() {
        var menuArr = [
            [1, "Area1", -1],
            [2, "Area2", -1],
            [3, "Area1-1", 1],
            [4, "Area1-2", 1],
            [5, "Area2-1", 2],
            [6, "Area2-2"
 
, 2],
            [7, "Area1-2-3", 4],
            [8, "Area2-2-1", 6],
        ];

//   var subArrToSubObj

        // 轉換成 物件陣列
        var subArrToSubObj = menuArr.map(function (arr, i) {
            return {key: arr[0], obj: {name: arr[1]}, parentKey: arr[2]};
        })
        console.log(subArrToSubObj);

        var
 
 menuObject = {};
        var tempObjArr = subArrToSubObj;
        var len = tempObjArr.length;

        for (var i = len - 2; i >= 0; i--) {
            for (var j = len - 1; j >= i; j--) {
                if (tempObjArr[i].key == tempObjArr[j].parentKey) {
                    if (tempObjArr[i].obj["subMenu"
 
]) {
                        tempObjArr[i].obj["subMenu"][tempObjArr[j].key] = tempObjArr[j].obj;
                    } else {
                        tempObjArr[i].obj["subMenu"] = {};
                        tempObjArr[i].obj["subMenu"][tempObjArr[j].key] = tempObjArr[j].obj;
                    }
                }
            }
        }

          // 設定根目錄
        for(var i in tempObjArr){
            if(tempObjArr[i].parentKey==-1){
                menuObject[tempObjArr[i].key]=tempObjArr[i].obj;
            }
        }
        console.log(menuObject);

//        console.log(tempObjArr);

    }
    fun();
</script>

物件轉陣列

 function  fun5() {
        var scoreObject = {
            "Tony": {
                "Math": 95,
                "English": 79,
                "Music": 68
            },
            "Simon": {
                "Math": 100,
                "English": 95,
                "Music": 98
            },
            "Annie": {
                "Math": 54,
                "English": 65,
                "Music": 88
            }
        }
        var arr= [];
        for (var i in scoreObject){
          arr.push(i,scoreObject[i].Math,scoreObject[i].English,scoreObject[i].Music);
        }
        console.log(arr);
    }
    fun5();