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This article mainly describes the use of the array sorting method sort() to sort by date. Go to sort() usage method
1 Encapsulation for comparison method compare
Two parameters:
Parameter 1 is:
排序用的字段;
Parameter 2 is: whether to sort in ascending ordertrue 为升序,false 为降序
Above code:
const compare = (attr, rev) => {
rev = (rev || typeof rev === 'undefined') ? 1 : -1;
return (a, b) => {
a = a[attr];
b = b[attr];
if (a < b) {
return rev * -1; }
if (a > b) {
return rev * 1; }
return 0;
};
};
2 Example use
Prepare an array to be sorted, where the time attribute is date as the field to be compared:
const arr = [
{
id: 1, time: "2022/09/09" },
{
id: 2, time: "2022/09/10" },
{
id: 3, time: "2022/09/11" },
{
id: 4, time: "2022/10/01" },
{
id: 5, time: "2022/10/02" },
{
id: 6, time: "2022/10/03" },
{
id: 7, time: "2022/01/01" },
{
id: 8, time: "2022/02/01" },
{
id: 9, time: "2022/03/01" },
];
Use the encapsulated compare method in the sort method:
const DESC = arr.sort(compare("time", false)); // 降序
console.log("DESC", DESC);
const ASC = arr.sort(compare("time", true)); // 升序
console.log("ASC", ASC);
