object A extends Token with Product with Serializable

object AdjunctUsage extends App

object ApplyUsage extends App

object ArrowUsage extends App

object B extends Token with Product with Serializable

object BifunctorUsage extends App

A Bifunctor is very similar to a Functor, which you are hopefully already familiar with.

A Bifunctor is very similar to a Functor, which you are hopefully already familiar with. Whereas a Functor operates on a * → * and has a single operation map which takes a function from A => B to map a F[A] to a F[B], a Bifunctor operates on a *,* → * and has a single operation bimap which takes two functions: A => C and a B => D to map a F[A,B] to a F[C,D]:

def bimap[A, B, C, D](fab: F[A, B])(f: A => C, g: B => D): F[C, D]

some examples of common types for which we have Bifunctor instances are Either, Validation, \/, Tuple2

object C extends Token with Product with Serializable

object CABRunLengthEncoder

object CaseInsensitiveUsage extends App

object ContTUsage extends App

object ContravariantCoyonedaUsage extends App

object DirectTypeClassUsage extends App

object DivideExample

object EndoUsage extends App

object EnumUsage extends App

object FibStateExample extends App

object FingerTreeUsage extends App

object Foldable1Usage extends App

object FoldableUsage extends App

object FreeApUsage extends App

object FreeMonadsUsage

object FreeUsage extends App

object FunctorUsage extends App

A Functor is a ubiquitous typeclass involving type constructors of kind * -> *, which is another way of saying types that have a single type variable.

A Functor is a ubiquitous typeclass involving type constructors of kind * -> *, which is another way of saying types that have a single type variable. Examples might be Option, List, Future.

The Functor category involves a single operation, named map:

def map[A, B](fa: F[A])(f: A => B): F[B]

This method takes a Function from A => B and turns an F[A] into an F[B]

object IListUsage extends App

object IsomorphismUsage extends App

object IterateeUsage extends App

object KleisliUsage extends App

object LaunchburyInterpreter extends App

Simple call-by-need (i.e.

Simple call-by-need (i.e. lazy) interpreter for Lambda Calculus based off of John Launchbury's "A Natural Semantics for Lazy Evaluation" Uses the "Barendregt convention": All variable names are globally unique (i.e. you cannot shadow variable names), and renames variables after substitution to maintain this invariant.

object MixedBag extends App

object MonadTransUsage extends App

object NameNeedValueUsage extends App

object NewTypeUsage extends App

object PartiallyApplied extends App

object ReaderWriterStateTUsage extends App

object STUsage extends App

object StateTUsage extends App

object StringUsage extends App

object SyntaxUsage extends App

object TagUsage extends App

scalaz contains a way to simulate something similar to a Haskell newtype, where we can take an existing type, and create a new type from it, and allow us to create new typeclass instances for our newly created type to get different behaviors.

scalaz contains a way to simulate something similar to a Haskell newtype, where we can take an existing type, and create a new type from it, and allow us to create new typeclass instances for our newly created type to get different behaviors. The same thing could be done with scala 2.10's Value Classes: https://docs.scala-lang.org/overviews/core/value-classes.html however one has to be very careful when using value classes, because there are a lot of instances in which using a value class will incur a runtime boxing/unboxing of your value, which incurs a runtime cost. The scalaz tagged types will never cause boxing of a value that is already AnyRef.

object Token

object TrampolineUsage extends App

object UnapplyInference extends App

Examples showing the use of Unapply to reduce the need for type annotations

object WordCount

Character/Line/Word Count from "The Essence of the Iterator Pattern".

See also: http://www.comlab.ox.ac.uk/jeremy.gibbons/publications/iterator.pdf

object WriterUsage extends App

Packages

example

package example

Type Members

Value Members

Ungrouped