v0.4.0

What's Changed

• improved performance for take/drop for Traversal/Fold (#186) @sagifogel
• Addition of applied syntax (#140) @sagifogel

Lens

final case class Person(name: String, address: Address)
final case class Address(city: String, street: Street)
final case class Street(name: String, number: Int)

val person = Person("Walter White", Address("Albuquerque", Street("Negra Arroyo Lane", 9)))

person
  .lens(_.address.street.number)
  .set(308)
// val res: Person = Person(Walter White,Address(Albuquerque,Street(Negra Arroyo Lane,308)))

Traversal

import cats.syntax.semigroup._
import proptics.syntax.all._
import proptics.instances.all._

val hktSupport = Set("Scala", "Haskell")

List("Erlang", "F#", "Scala", "Haskell")
  .each
  .toWords
  .filter(hktSupport.contains)
  .over(_ |+| " √")
// val res: List[String] = List(Erlang, F#, Scala √, Haskell √)

Fold

import proptics.syntax.all._
import proptics.instances.all._

val input = List("Say Anything", "My Octopus Teacher", "Name of the Rose")

input
  .foldable
  .andThen(words.take(1))
  .viewAll
// val res: List[String] = List(Say, My, Name)