這工作時,我試圖映射的情況下,類構造函數對元組的列表: scala> case class MyClas(x:Int, y:String, z:String)
defined class MyClas
scala> Seq((1,"hey","you"), (2, "blue","shoe")) map Function.tupled(MyClas)
res1: Seq[MyClas] =
如何設置點列的默認值在MySQL表 我試圖 `location` POINT NULL DEFAULT POINT(7.0, 81.0),
而是給出了一個錯誤 ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server versio