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themathmagician/pearlsInScala.scala

Last active March 25, 2018 00:05
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pearlsInScala.scala
// Map a list to a frequency list by using groupBy with identity and mapValues
val chars = "Peace and harmony"
chars.groupBy(identity).mapValues(_.size).toList
//Use a tupple: type to pass in two arguments for pattern matching, like goldilocks("porridge", "Mama")
def goldilocks(tuple: (String, String)) = tuple match {
case ("porridge", "Papa") ⇒ "Papa eating porridge"
case ("porridge", "Mama") ⇒ "Mama eating porridge"
case ("porridge", "Baby") ⇒ "Baby eating porridge"
case _ ⇒ "what?"
} //> goldilocks: (tuple: (String, String))String
assert(goldilocks("porridge", "Mama") == "Mama eating porridge")
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