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将类似数组的对象属性转换为数组不起作用

object arrays javascript

Akhilesh Kumar · 技术社区 · 7 年前

我有一个嵌套对象,如下所示(它可以有任何深度):

{
    "a": 5,
    "b": {
        "0": 1,
        "1": "x"
    },
    "x": {
        "a": 1,
        "1": "z"
    },
    "c": {
        "0": 3,
        "1": "Am",
        "3":{
            "0": 3,
            "1": "x",
            "2":{
                "0": 3,
                "1": "Y"
            },
            "length": 3
        },
        "length": 4
    }
}

{
    "a": 5,
    "x": {
        "a": 1,
        "1": "z"
    },
    "b": [1,"x"],
    "c": [3, "Am",undefind, [ 3, "x", [ 3, "Y" ] ] ]
}

我的写作方法如下:

function formatObjToArr(obj) {
    var kys = Object.keys(obj);
    var isObj = (/[^0-9]/g).test(kys.join('')) && !Array.isArray(obj);
    if(!isObj){
        obj.length===undefined && (obj.length = Math.max.apply(null,kys.map(function (i) { return parseInt(i) }))+1);
        obj = Array.prototype.map.apply(obj,[function (i) { return i}]);
        obj.forEach(function (i) {
            (typeof i === "object" && i!==null) && formetObjToArr(i);
        })
    }else {
        for (var property in obj) {
            if (obj.hasOwnProperty(property) && property!=='length') {
                if (typeof obj[property] === "object" && obj[property]!==null) {
                    formetObjToArr(obj[property]);
                }
            }
        }
    }
}

但它只是添加了length属性,并没有改变类型。我的代码输出如下:

{
  "a": 5,
  "b": {
      "0": 1,
      "1": "x",
      "length": 2
   },
  "x": {
      "a": 1,
      "1": "z"
  },
  "c": {
      "0": 3,
      "1": "Am",
      "3": {
          "0": 3,
          "1": "x",
          "2": {
              "0": 3,
              "1": "Y",
              "length": 2
          },
          "length": 3
      },
      "length": 4
  }
}

2 回复 | 直到 7 年前

Nina Scholz 7 年前

您可以检查对象并检查键是否在索引或 length

function convert(object) {
    var keys;
    if (!object || typeof object !== 'object') {
        return object;
    }

    keys = Object.keys(object);        
    if (keys.every(k => k === 'length' || Math.floor(k) === +k && k >= 0 && k < Math.pow(2, 31))) {
        return Object.assign([], object).map(convert);
    }

    return Object.assign(...keys.map(k => ({ [k]: convert(object[k]) })));
}

var data = { a: 5, b: { 0: 1, 1: "x" }, x: { 1: "z", a: 1 }, c: { 0: 3, 1: "Am", "3": { 0: 3, 1: "x", 2: { 0: 3, 1: "Y" }, length: 3 }, length: 4 } };

console.log(convert(data));

.as-console-wrapper { max-height: 100% !important; top: 0; }

Chayan 7 年前

var data = {
    "a": 5,
    "b": {
        "0": 1,
        "1": "x"
    },
    "c": {
        "0": 3,
        "1": "Am",
        "length": 2
    }
}


for(const d in data){
    if(typeof data[d] === 'object'){
        delete data[d]['length'];
        data[d] = Object.values(data[d]);
    }
}

console.log(data);