在Scala中将Map [String，String]转换为Map [String，Int] [英] Convert a Map[String, String] to Map[String, Int] in Scala

问题描述

我有一个Map，其中的键是一个String，值是一个Int，但表示为String.

I've a Map where the key is a String and the value is an Int but represented as a String.

scala> val m = Map( "a" -> "1", "b" -> "2", "c" -> "3" ) 
m: scala.collection.immutable.Map[String,String] = Map(a -> 1, b -> 2, c -> 3)

现在我要将其转换为Map[String, Int]

推荐答案

scala> m.mapValues(_.toInt)
res0: scala.collection.immutable.Map[String,Int] = Map(a -> 1, b -> 2, c -> 3)

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