Functional Programming in Scala chapter 2

gistfile1.scala

def fib(n: Int): Int = {
    def go(first: Int, second: Int, iteration: Int): Int = iteration match {
        case _ if iteration == n    => first + second
        case _                      => go(second, first + second, iteration + 1)
    }
    go(0, 1, 1)
}

gistfile2.scala

def isSorted[A](as: Array[A], ordered: (A,A) => Boolean): Boolean = {
    if (as.length > 1) {
        ordered(as.head, as.tail.head) && isSorted(as.tail, ordered) 
    } else {
        true
    }
}

gistfile3.scala

def curry[A,B,C](f: (A, B) => C): A => (B => C) = a => b => f(a,b)

gistfile4.scala

def uncurry[A,B,C](f: A => B => C): (A, B) => C = (a,b) => f(a)(b)

gistfile5.txt

def compose[A,B,C](f: B => C, g: A => B): A => C = x => f(g(x))