对象数组中的上一个最近日期

Question

var dateArray = ['11/01/2020', '10/01/2020', '09/01/2020', '07/01/2020', '06/01/2020']

如果我有一个日期 08/01/2020，那么我需要在数组中找到它之前最接近的日期 07/01/2020。我省略了时间，但这也是日期的一部分。

Answer 1

var dateArray = ['11/01/2020', '10/01/2020', '09/01/2020', '07/01/2020', '06/01/2020']

let date = '08/01/2020'

function findClosestPrevDate(arr,target){
    let targetDate = new Date(target);
    let previousDates = arr.filter(e => ( targetDate  - new Date(e)) > 0)
    let sortedPreviousDates =  previousDates.filter((a,b) => new Date(a) - new Date(b))
    return sortedPreviousDates[0] || null
}

let r1 = findClosestPrevDate(dateArray,"08/01/2020")
console.log(r1)

let r2 = findClosestPrevDate(dateArray,"10/01/2020")
console.log(r2)

对象数组中的上一个最近日期

Previous closest date from array of object

javascript

jquery

momentjs