在Scala中组合数组

Question

如果我有DerivedType1:BaseType和DerivedType2:BaseType和Array[DerivedType1]和Array[DerivedType2],什么是他们组合成的最简洁的方式Array[BaseType]？

Answer 1

使用++方法Array.

scala> class A; class B extends A; class C extends A
defined class A
defined class B
defined class C

scala> Array(new B, new B) ++ Array(new C, new C)
res33: Array[A] = Array(B@b7501b, B@ec5359, C@1540d0c, C@124a927)