jdegoes

Applied Functional Programming with Scala - Notes

Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

raulraja

{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE OverlappingInstances #-}

module Main where

import Control.Monad.Free

ericacm

trait ActorStack extends Actor {
  /** Actor classes should implement this partialFunction for standard
   *  actor message handling
   */
  def wrappedReceive: Receive

  /** Stackable traits should override and call super.receive(x) for
   *  stacking functionality
   */
  def receive: Receive = {

23Skidoo

import scala.collection.mutable._

// Binary tree ADT.
abstract class BinaryTree
case class Node (value : Int,
                 left : BinaryTree, right : BinaryTree) extends BinaryTree
case class Leaf (value : Int) extends BinaryTree

// An obvious recursive solution. Can cause a stack overflow if the tree is
// very tall.

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

oxbowlakes

/**
 * Part Zero : 10:15 Saturday Night
 *
 * (In which we will see how to let the type system help you handle failure)...
 *
 * First let's define a domain. (All the following requires scala 2.9.x and scalaz 6.0)
 */

import scalaz._
import Scalaz._