Question

I’d like to convert an Array[String] to an Array[Int], using map method. What is the shortest way to get a function of type (String) => Int to pass as map argument?

I’d prefer convert existing builtin ones like Integer.valueOf in some way.
A method of argument binding to shorten the construction like def parseInt(s:String) = Integer.parseInt(s, 10) would also be great.

Answer 1

scala> Array("1", "2", "3") map(_.toInt)
res4: Array[Int] = Array(1, 2, 3)

or

scala> def parseInt(s:String) = Integer.parseInt(s, 10)
parseInt: (s: String)Int

scala> Array("1", "2", "3") map parseInt
res7: Array[Int] = Array(1, 2, 3)