Fix

0043-the-many-faces-of-flatmap-pt2/ManyFacesOfFlatMapPt2.playground/Contents.swift

@@ -368,46 +368,3 @@ aDelayedInt
 // F<A> = Validated<A, E>
 // F<A> = Func<A0, A>
 // F<A> = Parallel<A>
-
-
-
-// extension Sequence {
-//   public func flatMap<ElementOfResult>(_ transform: (Element) throws -> ElementOfResult?) rethrows -> [ElementOfResult]
-// }
-
-// flatMap: ((A) -> B?) -> ((F<A>) -> F<B>)
-
-
-func fromThrowing<A, B>(_ f: @escaping (A) throws -> B) -> (A) -> Result<B, Swift.Error> {
-  return { a in
-    do {
-      return .success(try f(a))
-    } catch let error {
-      return .failure(error)
-    }
-  }
-}
-func toThrowing<A, B>(_ f: @escaping (A) -> Result<B, Swift.Error>) -> ((A) throws -> B) {
-  return { a in
-    switch f(a) {
-    case let .success(value):
-      return value
-    case let .failure(error):
-      throw error
-    }
-  }
-}
-
-
-extension Result {
-  func map<B>(_ f: (A) -> Result<B, Swift.Error>) -> Result<B, Swift.Error> {
-    fatalError("Unimplemented")
-  }
-}
-
-
-extension Result {
-  func flatMap<B>(_ f: (A) -> Result<Result<B, E>, Swift.Error>) -> Result<B, Swift.Error> {
-    fatalError("Unimplemented")
-  }
-}