勉強会の休憩中に部分適用とかいじった #CodePiece

CodePiece.swift

typealias Closure = (Int,Int) -> Int

let addClosure = { (a:Int, b:Int) -> Int in
    return a+b
}

let multipleClosure = { (a:Int, b:Int) -> Int in
    return a*b
}

func applyClosure(a:Int)(_ b:Closure) -> Int {
    return b(a,a)
}

func calc(closure:Closure) -> Int -> Int {
    return { x in closure(x,x)}
}

applyClosure(10)(addClosure)
applyClosure(10)(multipleClosure)

let addFunc = calc(addClosure)
calc(addClosure)(10)
addFunc(10)

let multipleFunc = calc(multipleClosure)
calc(multipleClosure)(10)
multipleFunc(10)