如何从对象数组中获取名称

Question

我有一个数组表示法中的 对象 数组。这个数组每次都会不同。

我希望能够获取该数组中元素的名称。例如，我遇到的麻烦是返回 [object] 而不是返回 assetA。我知道这是因为 assetA 本身就是一个对象。

我用来测试这个的代码示例是..

//the assetArray will have varying number of elements in the future
var assetArray=[assetX,assetY,assetZ, assetB, assetA];
var testtest=(new String(assetArray));
alert(testtest);
$.each(assetArray,function(intIndex,objValue){
    var test123=(new String(assetArray[intIndex]));
    alert(test123);
});

测试资产列表是..

var assetX = {
    assetNumber: "TESTX",
    assetDescription: "FLUX CAPACITOR",
    assetManufacturer: "Honeywell",
    assetCustomer: "MCFLY",
    assetDate: "03/04/1956"
};
var assetY = {
    assetNumber: "C123Y",
    assetDescription: "HOVERBOARD",
    assetManufacturer: "GE",
    assetCustomer: "MCFLY",
    assetDate: "12/03/1945"
};
var assetZ = {
    assetNumber: "9000Z",
    assetDescription: "ROCKETFOOTBALL",
    assetManufacturer: "Fluke",
    assetCustomer: "MCFLY JR.",
    assetDate: "01/05/3030"
};
var assetA = {
    assetNumber: "C34JJXA",
    assetDescription: "TEST DESCRIPTION",
    assetManufacturer: "Elgar",
    assetCustomer: "CUSTOMER1",
    assetDate: "05/09/1923"
};
var assetB = {
    assetNumber: "C892ALB",
    assetDescription: "DMM",
    assetManufacturer: "Agilent",
    assetCustomer: "CUSTOMER2",
    assetDate: "02/12/1986"
};

有没有人有使用 jQuery 解决此类问题的经验？

Answer 1

不存在物体的名称这样的东西。有物体，句号。有零个或多个引用给定对象的变量，句号。你不能从一个对象转到引用它的变量，句号，新段落。

如果此“名称”是对象本身的重要属性，请将其包含在对象中（添加 name 字段）或使用关联数组（也称为名称空间，幕后的对象）与此“ name”是键，资产对象是值而不是数组。

Answer 2

将资产对象作为属性存储在对象中（即使用关联数组而不是序数数组）：

var assets = {
    assetX: {
        assetNumber: "TESTX",
        assetDescription: "FLUX CAPACITOR",
        assetManufacturer: "Honeywell",
        assetCustomer: "MCFLY",
        assetDate: "03/04/1956"
    },
    assetY: {
        assetNumber: "C123Y",
        assetDescription: "HOVERBOARD",
        assetManufacturer: "GE",
        assetCustomer: "MCFLY",
        assetDate: "12/03/1945"
    },
    ...
};

$.each(assets, function (name, asset) {
    // name is the name (e.g. "assetX")
    // asset is the object instance
});

Answer 3

我不确定你想显示什么。

但您可以只显示对象的各个部分：

//the assetArray will have varying number of elements in the future
var assetArray=[assetX,assetY,assetZ, assetB, assetA];
var testtest=(new String(assetArray));
alert(testtest);
$.each(assetArray,function(intIndex,objValue){
    var test123=objValue.assetNumber; //etc
    alert(test123);
});

Answer 4

我建议使用常规 JavaScript 对象来将对象名称与值进行匹配。