CODEWITHSUNDEEP
scala
bula
bula

Reputation: 9429

Invoke a function argument in scala

In scala, I have seen some functions get another function as parameters. Can someone tell me how I can invoke that function.

If 

function A needs a function as a parameter.

and 

I pass B as an argument to function A.

Can someone please tell me then how I can invoke, or use the B, inside A function.

Upvotes: 1

Views: 114

Answers (1)

ice-phoenix
ice-phoenix

Reputation: 361

scala> def foo[A, R](func: A => R, arg: A): R = func(arg)
foo: [A, R](func: A => R, arg: A)R

scala> def bar(x: Int): Int = x + 1
bar: (x: Int)Int

scala> foo(bar, 42)
res1: Int = 43

scala> def nothing(x: Int): Unit = println("Yo: " + x)
nothing: (x: Int)Unit

scala> foo(nothing, 42)
Yo: 42

Upvotes: 4

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