/*
* Currying 
* The idea is to create a temp function that holds some
* params of another func constant, thereby simplifying calls
*
* @author gtowell
* Created: Aug 5, 2021
 */

// a function with 4 params
fun abcd(a:Int, b:Int, c:Int, d:Int) : Int {
    return (a+b+c)/d
}

// The currying function.  This fixes 3 of the params
// and retuns a new function with only the remaining param
fun currier(a:Int, b:Int, c:Int) : (Int)->Int {
    return { d:Int -> abcd(a,b,c,d) }
}

fun main() {
    // the curried functions do not interact.  Their closures are independent.
    val funcc = currier(10,20,30)
    val funcd = currier(5, 50, 150)
    println(funcc(3))
    println(funcc(4))
    println(funcd(10))
    println(funcc(10))
}