基于属性值对数组进行排序[重复]答案

【问题标题】：Sorting array based on a property value [duplicate]基于属性值对数组进行排序[重复]
【发布时间】：2021-04-24 11:14:35
【问题描述】：

我正在尝试根据该数组中的属性值对该对象数组进行排序。当我向正在使用的 API 发出请求时，这就是返回给我的内容。

0: {id: 23634, pollId: 6907, name: "B", type: "PollOption", totalAmountRaised: 341, …}
1: {id: 23635, pollId: 6907, name: "A", type: "PollOption", totalAmountRaised: 636, …}
2: {id: 23641, pollId: 6907, name: "C", type: "PollOption", totalAmountRaised: 246, …}
3: {id: 23642, pollId: 6907, name: "D", type: "PollOption", totalAmountRaised: 1092, …}
4: {id: 23643, pollId: 6907, name: "E", type: "PollOption", totalAmountRaised: 0, …}

我想按值 totalAmountRaised 从最大到最小对数组进行排序。我正在尝试使用 sort() 方法来避免编写一个大而复杂的函数。这就是我要找的。p>

arrayToSort.sort((a, b) => (a.totalAmountRaised < b.totalAmountRaised) ? 1 : -1);

0: {id: 23642, pollId: 6907, name: "D", type: "PollOption", totalAmountRaised: 1092, …}
1: {id: 23635, pollId: 6907, name: "A", type: "PollOption", totalAmountRaised: 636, …}
2: {id: 23634, pollId: 6907, name: "B", type: "PollOption", totalAmountRaised: 341, …}
3: {id: 23641, pollId: 6907, name: "C", type: "PollOption", totalAmountRaised: 246, …}
4: {id: 23643, pollId: 6907, name: "E", type: "PollOption", totalAmountRaised: 0, …}

但是，当我运行该方法时，它只交换了 totalAmountRaised 的值，它实际上并没有改变数组的顺序，这正是我正在寻找的。这就是实际返回的内容。

0: {id: 23634, pollId: 6907, name: "B", type: "PollOption", totalAmountRaised: 1092, …}
1: {id: 23635, pollId: 6907, name: "A", type: "PollOption", totalAmountRaised: 636, …}
2: {id: 23641, pollId: 6907, name: "C", type: "PollOption", totalAmountRaised: 341, …}
3: {id: 23642, pollId: 6907, name: "D", type: "PollOption", totalAmountRaised: 246, …}
4: {id: 23643, pollId: 6907, name: "E", type: "PollOption", totalAmountRaised: 0, …}

任何帮助将不胜感激，谢谢！

【问题讨论】：

提供一个 MRE 来演示您所描述的行为。

标签： javascript arrays sorting

【解决方案1】：

试试这个：

let arr = [
{id: 23634, pollId: 6907, name: "B", type: "PollOption", totalAmountRaised: 341,},
{id: 23635, pollId: 6907, name: "A", type: "PollOption", totalAmountRaised: 636,},
{id: 23641, pollId: 6907, name: "C", type: "PollOption", totalAmountRaised: 246,},
{id: 23642, pollId: 6907, name: "D", type: "PollOption", totalAmountRaised: 1092,},
{id: 23643, pollId: 6907, name: "E", type: "PollOption", totalAmountRaised: 0},
]

let sorted = arr.sort((a, b) => b.totalAmountRaised - a.totalAmountRaised)
console.log(sorted)

【讨论】：

array.sort() 对数组进行就地排序。分配给新变量没有意义。
是的，我刚刚意识到，在我发表评论后......我编辑了我的答案

【解决方案2】：

你不需要这么复杂a.totalAmountRaised < b.totalAmountRaised) ? 1 : -1

这应该是： b.totalAmountRaised - a.totalAmountRaised

你只需要这个：

let arrayToSort = [
    {id: 23634, pollId: 6907, name: "B", type: "PollOption", totalAmountRaised: 341,},
    {id: 23635, pollId: 6907, name: "A", type: "PollOption", totalAmountRaised: 636,},
    {id: 23641, pollId: 6907, name: "C", type: "PollOption", totalAmountRaised: 246,},
    {id: 23642, pollId: 6907, name: "D", type: "PollOption", totalAmountRaised: 1092,},
    {id: 23643, pollId: 6907, name: "E", type: "PollOption", totalAmountRaised: 0},
];
console.log(arrayToSort.sort((a, b) => {return b.totalAmountRaised - a.totalAmountRaised}));

【讨论】：