javascript - 下一个生日是谁？

Question

我正在尝试对包含出生日期的列表进行排序。当我使用此代码时，我会按月和日顺序获取所有日期。但我想在今天之前找到壁橱生日。所以下一个生日的人在上面，他的第二天在下面。因为还有一年他就有生日了。

//what i am looking for

//("Person5", "April 09, 1992"));
//("Person2", "October 17, 1981"));
//("Person3", "December 25, 1961"));
//("Person4", "January 10, 1977"));
//("Person1", "February 04, 1967"));

function person(navn, fødselsdage, foto, alder) {
    this.navn = navn;
    this.fødselsdage = fødselsdage;
}

var contacts = [];
var p1 = contacts.push(new person("Person1", "February 04, 1967"));
var p2 = contacts.push(new person("Person2", "October 17, 1981"));
var p3 = contacts.push(new person("Person3", "December 25, 1961"));
var p4 = contacts.push(new person("Person4", "January 10, 1977"));
var p5 = contacts.push(new person("Person5", "April 09, 1992"));

sortByDateNoYear = function (adate, bdate) {
    var results, lhdate = moment(adate.fødselsdage), rhdate = moment(bdate.fødselsdage);
    results = lhdate.months() > rhdate.months() ? 1 : lhdate.months() < rhdate.months() ? -1 : 0;
    if (results === 0) results = lhdate.date() > rhdate.date() ? 1 : lhdate.date() < rhdate.date() ? -1 : 0; return results;
}

contacts.sort(sortByDateNoYear);
contacts.sort(function (a, b) {
    return new Date(a.fødselsdage).getDate() - new Date(b.fødselsdage).getDate()
        && new Date(a.fødselsdage).getMonth() - new Date(b.fødselsdage).getMonth()
});


for (var key in contacts) {
    if (contacts.hasOwnProperty(key)) {
        var obj = contacts[key];
        document.write(obj["navn"] + " ");
        document.write(obj["fødselsdage"] + "<br>");
    }
}

Answer 1

看看这个example .我删除了 sortByDateNoYear 函数并更新了排序:

contacts.sort(function(a, b) {
    let needSort = 0;
    let today = moment()
        .startOf('day'); 
    let aBirthday = moment(a.fødselsdage, 'MMM DD, YYYY');
    let bBirthday = moment(b.fødselsdage, 'MMM DD, YYYY');
    let aNextBirthday = moment().month(aBirthday.month()).date(aBirthday.date());
    let bNextBirthday = moment().month(bBirthday.month()).date(bBirthday.date());
    if ((bNextBirthday.isAfter(today) && aNextBirthday.isAfter(today)) || (bNextBirthday.isBefore(today) && aNextBirthday.isBefore(today))){
      needSort = bNextBirthday.isAfter(aNextBirthday)? -1: 1;
    }
    else {
        needSort = bNextBirthday.isAfter(today)? 1: -1;
    }
     
    return needSort;
});

今天的输出将是:

Person5 April 09, 1992

Person2 October 17, 1981

Person3 December 25, 1961

Person4 January 10, 1977

Person1 February 04, 1967