Scala 將 Array[Int] 轉換為 Map[Int, Int] 的功能樣式

Question

我想將 Array[Int] 轉換為 Map[Int, Int] ，其中每個鍵是數組的元素，相應的值是數組中元素的索引。

Array(11, 12, 13) => Map((11,0), (12,1), (13,2))

是否可以在不使用具有更多功能風格的可變 map 的情況下做到這一點？

例如：

myArray.toMap(implicit def (... ))

Answer 1

scala> Array(11, 12, 13).zipWithIndex.toMap
res0: scala.collection.immutable.Map[Int,Int] = Map(11 -> 0, 12 -> 1, 13 -> 2)

PS But use HashMap / HashSet from Scala collections wisely to avoid security vulnerabilities on untrusted input under DoS/DoW attacks that exploit hash collision vulnerabilities of them directly or indirectly through Scala collections methods that use them under hood: toMap , keys , distinct , groupBy , ETC..