javascript 解法, 执行用时: 76 ms, 内存消耗: 43.6 MB, 提交时间: 2023-10-15 14:43:10

/**
 * @param {string} start
 * @param {string} end
 * @param {number} step
 * @yields {string}
 */
var dateRangeGenerator = function* (start, end, step) {
    var startDate = new Date(start), endDate = new Date(end);
    for (var date = startDate; date <= endDate; date.setDate(date.getDate() + step)) {
        yield date.toISOString().slice(0, 10);
    }
};

/**
 * const g = dateRangeGenerator('2023-04-01', '2023-04-04', 1);
 * g.next().value; // '2023-04-01'
 * g.next().value; // '2023-04-02'
 * g.next().value; // '2023-04-03'
 * g.next().value; // '2023-04-04'
 * g.next().done; // true
 */

javascript 解法, 执行用时: 76 ms, 内存消耗: 43.5 MB, 提交时间: 2023-10-15 14:42:53

/**
 * @param {string} start
 * @param {string} end
 * @param {number} step
 * @yields {string}
 */
var dateRangeGenerator = function* (start, end, step) {
    const i = Math.floor((new Date(end) - new Date(start)) / 24 / 3600 / 1000 / step)
    var j = 1
    while (j <= i + 1) {
        yield (new Date(new Date(start).getTime() + step * (j - 1) * 24 * 3600 * 1000)).toISOString().slice(0, 10)
        j++
    }
};

/**
 * const g = dateRangeGenerator('2023-04-01', '2023-04-04', 1);
 * g.next().value; // '2023-04-01'
 * g.next().value; // '2023-04-02'
 * g.next().value; // '2023-04-03'
 * g.next().value; // '2023-04-04'
 * g.next().done; // true
 */

typescript 解法, 执行用时: 88 ms, 内存消耗: 46.9 MB, 提交时间: 2023-10-15 14:42:33

// 格式化日期
function format(timestamp: number): string {
  const date = _Date(timestamp);
  const month = date.getMonth() + 1
  const day = date.getDate()
  return `${date.getFullYear()}-${month < 10 ? `0${month}` : month}-${day < 10 ? `0${day}` : day}`
}

function _Date(ts: number | string): Date {
  return new Date(ts);
}

function* dateRangeGenerator(start: string, end: string, step: number): Generator<string> {
  const startTime = _Date(start).getTime();
  const endTime = _Date(end).getTime();

  // 计算日期相差天数
  const diffDays = ~~((endTime - startTime) / (1000 * 3600 * 24));

  // 说明开始和结束日期相同
  if (!diffDays) {
    yield format(startTime);
    return;
  }
 
  let i = 0, curDay = Number(start.slice(8));
 
  while (i <= diffDays) {
    // 跳转日期并格式化输出
    yield format(_Date(start).setDate(curDay));
    // 记录跳转位置
    i += step;
    // 从初始开始日期不断往后加步数
    curDay += step;
  }
};

/**
 * const g = dateRangeGenerator('2023-04-01', '2023-04-04', 1);
 * g.next().value; // '2023-04-01'
 * g.next().value; // '2023-04-02'
 * g.next().value; // '2023-04-03'
 * g.next().value; // '2023-04-04'
 * g.next().done; // true
 */