假设我有一个包含几个对象的数组:
var array = [{id: 1, date: Mar 12 2012 10:00:00 AM}, {id: 2, date: Mar 8 2012 08:00:00 AM}];
如何按日期元素排序这个数组，从最接近当前日期和时间的日期下来?请记住，数组可能有许多对象，但为了简单起见，我使用2。
我会使用排序函数和自定义比较器吗?
当前回答
我能够实现排序使用以下行:
array.sort(function(a, b)
{
if (a.DueDate > b.DueDate) return 1;
if (a.DueDate < b.DueDate) return -1;
})
其他回答
在纠正JSON之后，这应该为你工作了:
var array = [{id: 1, date:'Mar 12 2012 10:00:00 AM'}, {id: 2, date:'Mar 8 2012 08:00:00 AM'}];
array.sort(function(a, b) {
var c = new Date(a.date);
var d = new Date(b.date);
return c-d;
});
Adding absolute will give better results
var datesArray =[
{"some":"data1","date": "2018-06-30T13:40:31.493Z"},
{"some":"data2","date": "2018-07-04T13:40:31.493Z"},
{"some":"data3","date": "2018-06-27T13:40:54.394Z"}
]
var sortedJsObjects = datesArray.sort(function(a,b){
return Math.abs(new Date(a.date) - new Date(b.date))
});
你可以在下划线js中使用sortBy。
http://underscorejs.org/#sortBy
示例:
var log = [{date: '2016-01-16T05:23:38+00:00', other: 'sample'},
{date: '2016-01-13T05:23:38+00:00',other: 'sample'},
{date: '2016-01-15T11:23:38+00:00', other: 'sample'}];
console.log(_.sortBy(log, 'date'));
简单的一行解决方案为我排序日期:
sort((a, b) => (a < b ? 1 : -1))
谢谢上面那些精彩的回答。我想了一个有点复杂的答案。只是给那些想比较不同答案的人。
const data = [
'2-2018', '1-2018',
'3-2018', '4-2018',
'1-2019', '2-2019',
'3-2019', '4-2019',
'1-2020', '3-2020',
'4-2020', '1-2021'
]
let eachYearUniqueMonth = data.reduce((acc, elem) => {
const uniqueDate = Number(elem.match(/(\d+)\-(\d+)/)[1])
const uniqueYear = Number(elem.match(/(\d+)\-(\d+)/)[2])
if (acc[uniqueYear] === undefined) {
acc[uniqueYear] = []
} else{
if (acc[uniqueYear] && !acc[uniqueYear].includes(uniqueDate)) {
acc[uniqueYear].push(uniqueDate)
}
}
return acc;
}, {})
let group = Object.keys(eachYearUniqueMonth).reduce((acc,uniqueYear)=>{
eachYearUniqueMonth[uniqueYear].forEach(uniqueMonth=>{
acc.push(`${uniqueYear}-${uniqueMonth}`)
})
return acc;
},[])
console.log(group); //["2018-1", "2018-3", "2018-4", "2019-2", "2019-3", "2019-4", "2020-3", "2020-4"]
