克隆一个对象的元素并推送到它的自身

Question

我有一个对象A.

如果我JSON.stringify(A)，我得到这个结果：

{
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }]
}

现在，我想克隆它自己的元素并制作一个更大的对象，如下所示：

{
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }],
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }],
     "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }]
}

如何使用 lodash/underscore/ 或 jQuery 来实现？

到目前为止，我已经尝试 jQuery.extend、lodash 联合，但没有成功。

Answer 1

您将无法创建您所描述的对象。您在每种情况下都重复属性名称 "OrderA"，这是不允许的。我建议使用一个新数组并将对象推入其中，而不是使用名称为属性的映射对象。像这样粗糙的东西：

var A; //Your OrderA Object.
var B = jQuery.extend(true, {}, A),
    C = jQuery.extend(true, {}, A),
    D = jQuery.extend(true, {}, A);

var arr = [A, B, C, D];

Answer 2

我认为您需要使用其他密钥，但这行不通吗？

var A = {
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }]
};

var B = {};

for (var attr in A.OrderA[0]) {
  if (A.OrderA[0].hasOwnProperty(attr)) {
    B[attr] = A.OrderA[0][attr];
  }
}

A.OrderB = [B];

JSON.stringify(A);

{
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }],
    "OrderB": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }]
}

Answer 3

对象键必须是唯一的，否则你会覆盖以前保存的数据。参见 DEMO。

方法如下：

var ALL = {
    "OrderA": [{
        "orderId": "19",
        "serverId": 129,
        "description": "Apple",
        "status": "1",
        "details": ""
    }]
};

['B','C','D'].forEach(function(letter,index) {
    ALL['Order'+letter] = $.extend(true, {}, ALL.OrderA);
});

console.log( JSON.stringify( ALL ) );

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

克隆一个对象的元素并推送到它的自身

clone an object's element and push to it's self

javascript

jquery

underscore.js

lodash