Luis Medina lu4nm3

## ex7_smart.scala
scala> EmailAddress("@example.com")
res0: Either[String,EmailAddress] = Left(Invalid email address)

## ex6_smart.scala
def apply(emailAddress: String): Either[String, EmailAddress] = {
  if (isValidAddress(emailAddress)) {
    Right(new EmailAddress(emailAddress))
  } else {
    Left("Invalid email address")
  }
}

## ex5_smart.scala
scala> EmailAddress("@example.com")
java.lang.IllegalArgumentException: requirement failed: Invalid email address
  at scala.Predef$.require(Predef.scala:277)
  at EmailAddress$.apply(<pastie>:23)
  ... 36 elided

## ex4_smart.scala
object EmailAddress {

  // Regex that captures the "official" format standard (RFC 5322) that email addresses must adhere to
  private val EmailRegex = """(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])""".r

  private def isValidAddress(emailAddress: String): Boolean = {
    EmailRegex.findAllMatchIn(emailAddress).length == 1
  }

  def apply(emailAddress: String): EmailAddress = {

## ex3_smart.scala
scala> EmailAddress("@example.com")
res0: EmailAddress = EmailAddress(@example.com)

## ex2_smart.scala
scala> EmailClient.sendEmail(from = EmailAddress("luis@example.com"), to = EmailAddress("carlos@example.com"))(
  """
  Hello,

  Hope you're doing well!

  Best,
  Luis
  """
)

## ex1_smart.scala
case class EmailAddress(emailAddress: String)

## ex11_adt.scala
val shoppingCart: List[Fruit] = List(
  Orange(0.25),
  Orange(0.33),
  Apple(0.22),
  Apple(0.27),
  Apple(0.30)
)

orderTotal(shoppingCart) // 4.69

## ex10_adt.scala
val shoppingCart: List[Item] = List(
  Orange(0.25),
  Orange(0.33),
  Apple(0.22),
  Apple(0.27),
  Apple(0.30),
  Baguette(2),
  ToothPaste(4)
)

## ex9_adt.scala
def orderTotal(shoppingCart: List[Item]): Double = {
  import PriceCompanion._

  shoppingCart.foldLeft(0.0) { case (total, item) =>
    total + implicitly[Price[Item]].price(item)
  }
}
	scala> EmailAddress("@example.com")
	res0: Either[String,EmailAddress] = Left(Invalid email address)
	def apply(emailAddress: String): Either[String, EmailAddress] = {
	if (isValidAddress(emailAddress)) {
	Right(new EmailAddress(emailAddress))
	} else {
	Left("Invalid email address")
	}
	}
	scala> EmailAddress("@example.com")
	java.lang.IllegalArgumentException: requirement failed: Invalid email address
	at scala.Predef$.require(Predef.scala:277)
	at EmailAddress$.apply(<pastie>:23)
	... 36 elided
	object EmailAddress {

	// Regex that captures the "official" format standard (RFC 5322) that email addresses must adhere to
	private val EmailRegex = """(?:[a-z0-9!#$%&'+/=?^_`{\|}~-]+(?:\.[a-z0-9!#$%&'+/=?^_`{\|}~-]+)\|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]\|\\[\x01-\x09\x0b\x0c\x0e-\x7f])")@(?:(?:[a-z0-9](?:[a-z0-9-][a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-][a-z0-9])?\|\[(?:(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]\|2[0-4][0-9]\|[01]?[0-9][0-9]?\|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]\|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])""".r

	private def isValidAddress(emailAddress: String): Boolean = {
	EmailRegex.findAllMatchIn(emailAddress).length == 1
	}

	def apply(emailAddress: String): EmailAddress = {
	scala> EmailAddress("@example.com")
	res0: EmailAddress = EmailAddress(@example.com)
	scala> EmailClient.sendEmail(from = EmailAddress("luis@example.com"), to = EmailAddress("carlos@example.com"))(
	"""
	Hello,

	Hope you're doing well!

	Best,
	Luis
	"""
	)
	val shoppingCart: List[Fruit] = List(
	Orange(0.25),
	Orange(0.33),
	Apple(0.22),
	Apple(0.27),
	Apple(0.30)
	)

	orderTotal(shoppingCart) // 4.69
	val shoppingCart: List[Item] = List(
	Orange(0.25),
	Orange(0.33),
	Apple(0.22),
	Apple(0.27),
	Apple(0.30),
	Baguette(2),
	ToothPaste(4)
	)
	def orderTotal(shoppingCart: List[Item]): Double = {
	import PriceCompanion._

	shoppingCart.foldLeft(0.0) { case (total, item) =>
	total + implicitly[Price[Item]].price(item)
	}
	}