这工作时,我试图映射的情况下,类构造函数对元组的列表: 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] =
如何设置点列的默认值在MySQL表 我试图 `location` POINT NULL DEFAULT POINT(7.0, 81.0),
而是给出了一个错误 ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server versio