Scala-从地图返回函数

Question

In scala, how would i declare & instantiate a map that returns a function (for the sake of argument? A function that accepts two variables, one a String, one an Int)?

I am envisioning:

val myMap = Map[String, (String,Int)=>Boolean](
    WHAT GOES HERE???
)

Let's just map the string "a" to this cool function. I don't care much about what the function does - returns true, perhaps?

Answer 1

Try this:

  val myMap = Map[String, (String, Int) => Boolean](
    "Test" -> ((s, i)  => true)
  )

Answer 2

you can do something like this:

val map = Map("key" -> { (str: String, n: Int) =>
  str.indexOf(n) == -1
})

result:

> map: scala.collection.immutable.Map[String,(String, Int) => Boolean] = Map(key - <function2>)