数组 – 生成新数组,其中所有正数首先出现,然后是负数或零,但顺序相同

这是 Scala for the Impatient的一个问题,Arrays的章节陈述为

Given an array of integers,produce a new array that contains all
positive values of the original array,in their original order,
followed by all values that are zero or negative,in their original
order.

我的尝试是

scala> val b = Array(-1,2,3,4,-10,-12)
b: Array[Int] = Array(-1,-12)

scala> val(positive,negative) = b partition(_ > 0)
positive: Array[Int] = Array(2,4)
negative: Array[Int] = Array(-1,-12)

scala> positive ++ negative
res11: Array[Int] = Array(2,-1,-12)

我可以在一条线上做得更好吗？我不确定

解决方法

考虑过滤器和过滤器,如下所示,

b.filter(_ > 0) ++ b.filterNot(_ > 0)