Question

我使用map方法将对象转换为数组。以下代码中的问题是什么？

var data = {
    "productName": "fsdfsdf",
    "productDesc": "",
    "category": null,
    "categoryName": "",
    "style": null,
    "styleName": "",
    "substyle": null,
    "substyleName": "",
    "store": null,
    "storeName": "",
    "stand": null,
    "standName": "",
    "rack": null,
    "rackName": "",
    "roll": null,
    "rollName": "",
    "color": null,
    "width": "",
    "widthunit": "meter",
    "length": 0,
    "lengthunit": "meter",
    "pieces": "",
    "cutofquantity": "",
    "estimatedConsumption": ""
}

var key = $.map(data, function(value, index) {
    return index;
});
var value = $.map(data, function(value, index) {
    return value;
});

console.log(value)

请参阅Matlab documentation JSFiddle以获取实例。

Answer 1

因为你有length: 0作为你的一个属性，jQuery认为该对象是一个数组而不是一个对象。

然后循环遍历从0到0（不包括）的数字索引并生成零长度数组。

Answer 2

如果您想与length:0

一起使用，则可以使用此选项

var data = {
    "productName": "fsdfsdf",
    "productDesc": "",
    "category": null,
    "categoryName": "",
    "style": null,
    "styleName": "",
    "substyle": null,
    "substyleName": "",
    "store": null,
    "storeName": "",
    "stand": null,
    "standName": "",
    "rack": null,
    "rackName": "",
    "roll": null,
    "rollName": "",
    "color": null,
    "width": "",
    "widthunit": "meter",
    "length": 0,
    "lengthunit": "meter",
    "pieces": "",
    "cutofquantity": "",
    "estimatedConsumption": ""
};



for(var key in data) {
    if(data.hasOwnProperty(key)) {
      console.log(key)  ;
      console.log(data[key]);  
    }
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Answer 3

您可以执行以下操作：

var data = {
    "productName": "fsdfsdf",
    "productDesc": "",
    "category": null,
    "categoryName": "",
    "style": null,
    "styleName": "",
    "substyle": null,
    "substyleName": "",
    "store": null,
    "storeName": "",
    "stand": null,
    "standName": "",
    "rack": null,
    "rackName": "",
    "roll": null,
    "rollName": "",
    "color": null,
    "width": "",
    "widthunit": "meter",
    "length": 0,
    "lengthunit": "meter",
    "pieces": "",
    "cutofquantity": "",
    "estimatedConsumption": ""
};

var arr = Object.keys(data).map(function(k) { return data[k] });  
console.log(arr)

小提琴玩：https://jsfiddle.net/u5t4L55g/

Answer 4

循环遍历property的每个object，然后将key和value推送到数组中，如下所示。希望这会对你有所帮助。

＆＃13;

var data = {
  "productName": "fsdfsdf",
  "productDesc": "",
  "category": null,
  "categoryName": "",
  "style": null,
  "styleName": "",
  "substyle": null,
  "substyleName": "",
  "store": null,
  "storeName": "",
  "stand": null,
  "standName": "",
  "rack": null,
  "rackName": "",
  "roll": null,
  "rollName": "",
  "color": null,
  "width": "",
  "widthunit": "meter",
  "length": 0,
  "lengthunit": "meter",
  "pieces": "",
  "cutofquantity": "",
  "estimatedConsumption": ""
}

var value = [];
var key = [];
for (var property in data) {
    key.push(property);
    value.push(data[property]);
}

console.log(value)

＆＃13;

Answer 5

var key = Object.keys(data).map(function(index, value) { return index });
var value = Object.keys(data).map(function(index, value) { return data[index] });

所以它给出了键值和值对

没有从对象获取数组

5 个答案: