Kotlin Standard Library Cookbook

How it works...

Let's explore how to use the curried() function in action. In the following example we are going to call curried() on the following function instance which is responsible for computing a sum of three integers:

fun sum(a: Int, b: Int, c: Int): Int = a + b + c

In order to obtain a curried form of the sum() function, we have to invoke the curried() function on its reference:

::sum.curried()

Then we can invoke the curried sum function in the following way:

val result: Int = ::sum.curried()(1)(2)(3)

In the end, the result variable is going to be assigned an integer value equal to 6.

In order to invoke the curried() extension function, we access the sum() function reference using the :: modifier. Then we invoke the next functions ...