将布尔掩码应用于Scala数组

I'm trying to use an array of booleans to choose particular elements in another array. For example:

我正在尝试使用布尔数组来选择另一个数组中的特定元素。例如：

val arr = Seq("A", "B", "C")
val mask = Seq(true,false,true)

and I'd like the output to be a new array:

我希望输出成为一个新数组：

val arr_new = Seq("A","C")

Is there a way to achieve this in Scala?

有没有办法在Scala中实现这一目标？

1 个解决方案

#1

scala> arr.zip(mask).collect { case (v, true) => v }
res0: Seq[String] = List(A, C)