javascript - 检查对象中日期的顺序

Question

我试图确保对象中输入的日期顺序符合逻辑顺序。这是我的代码:

function checkDates(pet) {
        const dates = [
            pet.birthDate,
            pet.saleDate,
            pet.acquisitionDate,
            pet.deathDate
        ].filter( (date) => {
            // filter out undefined items
            return date;
        });

        // list of dates in their chronological order
        const sortedDates = dates.slice(0).sort();

        const inOrder = dates.every( (date, i) => {
            // check to make sure entered date is the same as the chronological date
            return date === sortedDates[i];
        });

        if (!inOrder) {
            throw new ValidationError('The dates are in an illogical order');
        }
    }

问题是 saleDate 和 AcquisitionDate 不需要按照该顺序(如日期数组中定义) - 它们只需要大于birthDate并小于deathDate即可。不同的日期不是必需的，例如，通过我的外观传递的宠物对象如下所示:

const pet = {
  name: "Sam",
  birthDate: "2017-01-01",
  acquisitionDate: "2017-02-01",
  saleDate: "2017-03-01"
}

进一步说明:如果存在，出生日期必须始终排在第一位，死亡日期必须始终排在最后。出售和收购必须在出生日期和死亡日期之间(如果存在)，否则，无论出售发生在收购之前还是反之亦然。

Answer 1

您走在正确的道路上，但不一定需要排序:

function checkDates(pet) {
    const dates = [
        pet.birthDate,
        pet.saleDate,
        pet.acquisitionDate,
        pet.deathDate
    ].filter(date => date);

    const inOrder =
        (pet.birthDate ? dates.every(date => date >= pet.birthDate) : true) &&
        (pet.deathDate ? dates.every(date => date <= pet.deathDate) : true)

    if (!inOrder) {
        throw new ValidationError('The dates are in an illogical order');
    }
}