curryingLeadsToComposition

curryingLeadsToComposition.swift

//: Playground - noun: a place where people can play

import UIKit

func add(a: Int)(b: Int) -> Int {
    return a + b
}

func div(a: Int)(b: Int) -> Int {
    return a % b
}

let addTwo = add(2)
let divTwo = div(2)

infix operator <<< { associativity left }
func <<< <A, B, C>(f: B -> C, g: A -> B) -> A -> C {
    return { x in f(g(x)) }
}

let newFn = divTwo <<< addTwo

newFn(6)