Scala - return a function from a map

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?

Noah · Accepted Answer · 2013-07-18 15:37:00Z

4

Try this:

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

answered Jul 18, 2013 at 15:37

Noah

14k4 gold badges39 silver badges45 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

bharal Over a year ago

presto! thanks. I was putting curly brackets and defining the inputs

score 0 · Accepted Answer · 2013-07-21 11:20:56Z

0

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>)

edited Jul 21, 2013 at 11:20

answered Jul 21, 2013 at 10:47

user1980875

Collectives™ on Stack Overflow

Scala - return a function from a map

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related