Amitay Horwitz amitayh

Applied Functional Programming with Scala - Notes

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

	package fpmax

	import scala.util.Try
	import scala.io.StdIn.readLine

	object App0 {
	def main: Unit = {
	println("What is your name?")

	val name = readLine()

	package lambdaconf.introfp2

	// import scalaz._
	// import Scalaz._

	object functions {
	object totality {
	///def f[A]: A = null

	def g[A]: A = throw new Error

	import java.nio.ByteBuffer;
	import java.util.UUID;

	public class UuidAdapter {
	public static byte[] getBytesFromUUID(UUID uuid) {
	ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
	bb.putLong(uuid.getMostSignificantBits());
	bb.putLong(uuid.getLeastSignificantBits());

	return bb.array();

	package com.wixpress.quotes.common

	import java.util.UUID

	object CQRS {

	////////////////////////////////////////////////////////////////////////////////
	// Example application
	////////////////////////////////////////////////////////////////////////////////