Contents

object Zipper {
  // A zipper for a binary tree.
  // ??? Zipper[A] ???

  // Get a zipper focussed on the root node.
  def fromTree[A](bt: BinTree[A]): Zipper[A] = ???

  // Get the complete tree from a zipper.
  def toTree[A](zipper: Zipper[A]): BinTree[A] = ???

  // Get the value of the focus node.
  def value[A](zipper: Zipper[A]): A = ???

  // Get the left child of the focus node, if any.
  def left[A](zipper: Zipper[A]): Option[Zipper[A]] = ???

  // Get the right child of the focus node, if any.
  def right[A](zipper: Zipper[A]): Option[Zipper[A]] = ???

  // Get the parent of the focus node, if any.
  def up[A](zipper: Zipper[A]): Option[Zipper[A]] = ???

  // Set the value of the focus node.
  def setValue[A](v: A, zipper: Zipper[A]): Zipper[A] = ???

  // Replace a left child tree.
  def setLeft[A](l: Option[BinTree[A]], zipper: Zipper[A]): Zipper[A] = ???

  // Replace a right child tree.
  def setRight[A](r: Option[BinTree[A]], zipper: Zipper[A]): Zipper[A] = ???
}

// A binary tree.
case class BinTree[A](value: A, left: Option[BinTree[A]], right: Option[BinTree[A]])

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.179	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.178	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.177	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.176	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.175	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.174	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.173	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.172	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.171	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.170	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.169	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.167	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.166	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.165	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.164	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.163	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.162	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.161	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala
trackler-2.2.1.160	tracks/scala/exercises/zipper/src/main/scala/Zipper.scala