如何根据javascript中的时间戳对3个排序数组进行排序答案

【问题标题】：how to sort 3 sorted arrays based on timestamps in javascript如何根据javascript中的时间戳对3个排序数组进行排序
【发布时间】：2020-12-09 04:54:34
【问题描述】：

给定 3 个排序的对象数组，其中每个对象都有一个 timestamp 键，我如何将它们合并到 Javascript 中的单个排序数组中，最终数组根据时间戳进行排序？

// merge these messages, flights and hotels arrays into one array and sort them 
// messages, flights and hotels are already sorted 

const messages = [{"timestamp": "2019-06-28", "message": "messageVal"}, {"timestamp": "2019-06-29", "message": "messageVal"}];
const flights = [{"timestamp": "2019-08-19", "flight": "flightVal"}, {"timestamp": "2019-08-28", "flight": "flightVal"}];
const hotels = [{"timestamp": "2019-11-20", "hotel": "hotelVal"}];

【问题讨论】：

标签： javascript arrays algorithm sorting date

【解决方案1】：

您可以将所有这些组合在一个数组中，将其展平并排序

const messages = [
  { timestamp: "2019-06-28", message: "messageVal" },
  { timestamp: "2019-06-29", message: "messageVal" },
]
const flights = [
  { timestamp: "2019-08-19", flight: "flightVal" },
  { timestamp: "2019-08-28", flight: "flightVal" },
]
const hotels = [{ timestamp: "2019-11-20", hotel: "hotelVal" }]

const res = [messages, flights, hotels]
  .flat()
  .sort((a, b) => b.timestamp - a.timestamp)

console.log(res)

【讨论】：

【解决方案2】：

您可以将时间戳属性转换为日期，使用 flat() 合并数组，然后排序。

我做了一个可以帮助你的简单函数，它允许升序和降序。

let array1 = [{"timestamp": "2019-06-30", "message": "1"}, {"timestamp": "2019-06-29", "message": "2"}];
let array2 = [{"timestamp": "2019-06-27", "message": "3"}, {"timestamp": "2019-06-26", "message": "4"}];

function sortArray(input, isDescending = false){
    return input.flat().sort((x1, x2) => isDescending ? new Date(x2.timestamp) - new Date(x1.timestamp) : new Date(x1.timestamp) - new Date(x2.timestamp));
}

console.log(sortArray([array1, array2])); //Ascending
console.log(sortArray([array1, array2], true)); //Descending

【讨论】：