javascript - javascript中按子数组属性值对对象数组进行排序

Question

我有一个 JavaScript 对象数组:

var people = [
{
    "name": "Edward",
    "age": 100,
    "wallet": {
        "location": "home",
        "cash": 500
    },
    "bank": {
        "location": "bank street",
        "cash": 22100
    }
},
{
    "name": "Lisa",
    "age": 30,
    "wallet": {
        "location": "home",
        "cash": 20
    },
    "bank": {
        "location": "bank street",
        "cash": 12340
    }
},
{
    "name": "Elisabeth",
    "age": 50,
    "wallet": {
        "location": "home",
        "cash": 200
    },
    "bank": {
        "location": "bank street",
        "cash": 5000
    }
}
];

如何按 wallet.cash 对它们进行排序？

如果我想按名称或年龄对这些对象进行排序，那么下面的示例(由 Ege Özcan 编写)可以工作，但我很难修改它以使用多维键。

function dynamicSort(property) {
var sortOrder = 1;
if(property[0] === "-") {
    sortOrder = -1;
    property = property.substr(1);
}
return function (a,b) {
    var result = (a[property] < b[property]) ? -1 : (a[property] > b[property]) ? 1 : 0;
    return result * sortOrder;
}
}

这有效:

people.sort(dynamicSort("name"));

这不会:

people.sort(dynamicSort("wallet.cash"));

提前谢谢您!

Answer 1

您可以将两个不同的参数传递给dynamicSort函数

function dynamicSort(property1,property2) {
var sortOrder = 1;
if(property1[0] === "-") {
    sortOrder = -1;
    property1 = property1.substr(1);
}
return function (a,b) {
    var result = (a[property1][property2] < b[property1][property2]) ? -1 : (a[property1][property2] > b[property1][property2]) ? 1 : 0;
    return result * sortOrder;
}
}

然后调用

dynamicSort("wallet","cash");

演示

var people = [
{
    "name": "Edward",
    "age": 100,
    "wallet": {
        "location": "home",
        "cash": 500
    },
    "bank": {
        "location": "bank street",
        "cash": 22100
    }
},
{
    "name": "Lisa",
    "age": 30,
    "wallet": {
        "location": "home",
        "cash": 20
    },
    "bank": {
        "location": "bank street",
        "cash": 12340
    }
},
{
    "name": "Elisabeth",
    "age": 50,
    "wallet": {
        "location": "home",
        "cash": 200
    },
    "bank": {
        "location": "bank street",
        "cash": 5000
    }
}
];

    function dynamicSort(property1,property2) {
    var sortOrder = 1;
    if(property1[0] === "-") {
        sortOrder = -1;
        property1 = property1.substr(1);
    }
    return function (a,b) {
        var result = (a[property1][property2] < b[property1][property2]) ? -1 : (a[property1][property2] > b[property1][property2]) ? 1 : 0;
        return result * sortOrder;
    }
    }

alert(JSON.stringify(people.sort(dynamicSort("wallet","cash"))))