将Vector转换为元组scala

Question

是否有可能将异构向量的向量转换为Scala中的Tuple3列表

即

Vector(Vector(1,"a","b"),Vector(2,"b","c")) to List(Tuple3(1,"a","b"),Tuple3(2,"b","c"))

Answer 1

明确地将每个内部转换Vector为Tuple3:

vector.map {
    case Vector(f, s, t) => Tuple3(f, s, t)
}.toList

如果你有可变大小的向量,你可以使用更通用的方法:

def toTuple(seq: Seq[_]): Product = {
  val clz = Class.forName("scala.Tuple" + seq.size)
  clz.getConstructors()(0).newInstance(seq.map(_.asInstanceOf[AnyRef]): _*).asInstanceOf[Product]
}

vector.map(toTuple).toList

但它有限制:向量的最大长度为22.