按年份和月份对数组排序JavaScript
我们有一个像这样的数组-
const arr = [{
year: 2020,
month: 'January'
}, {
year: 2017,
month: 'March'
}, {
year: 2010,
month: 'January'
}, {
year: 2010,
month: 'December'
}, {
year: 2020,
month: 'April'
}, {
year: 2017,
month: 'August'
}, {
year: 2010,
month: 'February'
}, {
year: 2020,
month: 'October'
}, {
year: 2017,
month: 'June'
}]我们必须根据年份以升序（升序）对数组进行排序。而且，如果存在两个具有相同year属性的对象，那么我们就必须根据月份对这些年份进行排序（例如jan，然后是feb，然后是三月，依此类推）。
因此，让我们为该排序问题编写代码。完整的代码将是-
示例
const arr = [{
year: 2020,
month: 'January'
}, {
year: 2017,
month: 'March'
}, {
year: 2010,
month: 'January'
}, {
year: 2010,
month: 'December'
}, {
year: 2020,
month: 'April'
}, {
year: 2017,
month: 'August'
}, {
year: 2010,
month: 'February'
}, {
year: 2020,
month: 'October'
}, {
year: 2017,
month: 'June'
}]
const months = ['January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December'];
const sorter = (a, b) => {
if(a.year !== b.year){
return a.year - b.year;
}else{
return months.indexOf(a.month) - months.indexOf(b.month);
};
};
arr.sort(sorter);
console.log(arr);我们检查年份是否不同，我们只是根据年份对它们进行排序，但是当年份相同时，我们将利用定义的自定义月份数组检查月份，这样，具有相同年份的对象将根据几个月。
输出结果
控制台中的输出将为-
[
{ year: 2010, month: 'January' },
{ year: 2010, month: 'February' },
{ year: 2010, month: 'December' },
{ year: 2017, month: 'March' },
{ year: 2017, month: 'June' },
{ year: 2017, month: 'August' },
{ year: 2020, month: 'January' },
{ year: 2020, month: 'April' },
{ year: 2020, month: 'October' }
]