如何按星期幾提前獲得最近的日期？-有解無憂

我是新來的，我需要通過一周中的天數來獲得最近的日期。

根據當前日期，我需要獲取，例如：

const currentWeekDay = '4'; (14.04)
const preparedAlternativeDates = [
  { DAY: 1, VALUE: '18.04' },
  { DAY: 2, VALUE: '19.04'},
  { DAY: 3, VALUE: '20.04'},
  { DAY: 4, VALUE: '21.04'},
  { DAY: 5, VALUE: '15.04'},
  { DAY: 6, VALUE: '16.04'},
  { DAY: 7, VALUE: '17.04'},
];

我正在嘗試使用下面的腳本，但它不起作用。也許有更簡單的方法可以做到這一點？

const ALTERNATIVE_DATES = Object.freeze([
  { DAY: 1, VALUE: null },
  { DAY: 2, VALUE: null },
  { DAY: 3, VALUE: null },
  { DAY: 4, VALUE: null },
  { DAY: 5, VALUE: null },
  { DAY: 6, VALUE: null },
  { DAY: 7, VALUE: null },
]);

const preparedAlternativeDates = ALTERNATIVE_DATES.map((alternativeDate: any) => {
  if (!alternativeDate.VALUE) {
    const alternativeDateDay = Number(alternativeDate.DAY);
    const currentWeekDay = Number(moment().isoWeekday());

    if (alternativeDateDay <= currentWeekDay) {
      alternativeDate.VALUE = moment().add(alternativeDateDay   currentWeekDay - 1, 'd').startOf('day');
    } else {
      alternativeDate.VALUE = moment().add(alternativeDateDay - currentWeekDay, 'd').startOf('day');
    }
  }

  return {
    day: alternativeDate.DAY,
    value: alternativeDate.VALUE
  };
});

我將不勝感激任何幫助。

uj5u.com熱心網友回復：

我剛剛調整了您的代碼并測驗了結果。這應該適合你：

const ALTERNATIVE_DATES = Object.freeze([
     { DAY: 1, VALUE: null },
     { DAY: 2, VALUE: null },
     { DAY: 3, VALUE: null },
     { DAY: 4, VALUE: null },
     { DAY: 5, VALUE: null },
     { DAY: 6, VALUE: null },
     { DAY: 7, VALUE: null },
  ]);

  const preparedAlternativeDates = ALTERNATIVE_DATES.map((alternativeDate: any) => {
     if (!alternativeDate.VALUE) {
        const wishedDay = Number(alternativeDate.DAY);
        const today = moment().isoWeekday();

        if (today < wishedDay) {
           alternativeDate.VALUE = moment().isoWeekday(wishedDay).format('DD.MM');
        } else {
           alternativeDate.VALUE = moment().add(1, 'weeks').isoWeekday(wishedDay).format('DD.MM');
        }
     }

     return {
        day: alternativeDate.DAY,
        value: alternativeDate.VALUE,
     };
  });

如何按星期幾提前獲得最近的日期？

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標籤：javascript 打字稿日期时刻

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