Accumulator factory: Difference between revisions

Overloads would be needed for all six primitive numeric types but, in the interests of brevity, only two overloads of 'foo' have been coded:

fun foo(n: Double): (d: Double) -> Double {

var nn = n

return { nn += it; nn }

}

fun foo(n: Int): (i: Int) -> Int {

var nn = n

return { nn += it; nn }

}

fun main(args: Array<String>) {

val x = foo(1.0) // calls 'Double' overload

x(5.0)

foo(3.0)

println(x(2.3))

val y = foo(1) // calls 'Int' overload

y(5)

foo(5)

println(y(2))

}

8.3

8