Function mapEffect

pre

• pre<A, B, E = unknown, R = never>(
      f: (a: A) => Effect<B, E, R>,
  ): (self: Tree<A>) => Effect<Tree<B>, E, R>

  Map an effectful function over the tree in pre-order: parent effect is run before children.

  Type Parameters

  • A
  • B
  • E = unknown
  • R = never

  Parameters

  • f: (a: A) => Effect<B, E, R>

  Returns (self: Tree<A>) => Effect<Tree<B>, E, R>