Question

我有一个像下面这样的对象。尝试根据值按升序重新排列。与Javascript数组排序方法类似。

    var masterList = {
    "1": "google",
    "2": "yahoo",
    "3": "msn",
    "4": "stackoverflow",
    "5": "github",
    "6": "jsfiddle",
    "7": "amazon",
    "8": "ebay"
}

请让我知道更好的解决方案...

Answer 1

JavaScript对象没有订单。即使大多数浏览器按照相同的顺序迭代创建属性，也无法保证，因此对象不支持排序。

有关详细信息，请参阅此处：Does JavaScript Guarantee Object Property Order?

您可能也对此问题的John Resig has got to say感兴趣。

如果您需要可排序列表，则必须将其存储为对象数组：

var masterList = [
    { key: 1, val: "google" },
    { key: 2, val: "yahoo" },
    { key: 3, val: "msn" },
    { key: 4, val: "stackoverflow" },
    { key: 5, val: "github" },
    { key: 6, val: "jsfiddle" },
    { key: 7, val: "amazon" },
    { key: 8, val: "ebay" }
];

然后，要对它们进行排序，只需使用常规数组的sort方法：

masterList = masterList.sort(function (a, b) {
    return a.val.localeCompare( b.val );
});

这是小提琴：http://jsfiddle.net/ASrUD/

Answer 2

var obj = {
    "1": "google",
    "2": "yahoo",
    "3": "msn",
    "4": "stackoverflow",
    "5": "github",
    "6": "jsfiddle",
    "7": "amazon",
    "8": "ebay"
};

var arr = [];

for (var key in obj) {
    if (obj.hasOwnProperty(key)) {
        arr.push(obj[key]);
    }
}

alert(arr.sort());

这将按升序对您的值进行排序。让我给一些时候会回复你如何将其转换为对象。

Answer 3

var masterList = {
    "2": "yahoo",
    "3": "msn",
    "4": "stackoverflow",
    "5": "github",
    "6": "jsfiddle",
    "7": "amazon",
    "8": "ebay",
    "1": "google",
   }
var masterList_ = {}

Object.keys(masterList).sort().forEach(a=>masterList_[a]=masterList[a])
console.log(masterList_)

Javascript基于值对键值对象进行排序

3 个答案: