python保留两位小数: In [1]: a = 5.026 In [2]: b = 5.000 In [3]: round(a,2) Out[3]: 5.03 In [4]: round(b,2) Out[4]: 5.0 In [5]: '%.2f' % a Out[5]: '5.03' In [6]: '%.2f' % b Out[6]: '5.00' In [7]: float('%.2f' % a) Out[7]: 5.03 In [8]: float('%.2f' % b) Out[…
//判断两个时间段是否有交集 private function checkTimeCross($start_time,$end_time){ $sql ) AND ((start_time > {$start_time} AND start_time < {$end_time}) OR (start_time < {$start_time} AND end_time > {$end_time}) OR (end_time > {$start_time} AND end_tim…