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我想:如何将Range.Inclusive转换为NumericRange.Inclusive [Char]类型?
val s: String ="12ab"
我想:
//it is ok
List(('1', '2'), ('a', 'b')).map { case (a, b) => a to b mkString } mkString
// it is invalid
List((1, 2), ('a', 'b')).map{case (a,b)=> a to b mkString } mkString
如何让第二个例子编译?