correct IO's flatMap method (#29)

fommil · Oct 7, 2018 · 068319e · 068319e
1 parent 1293053
commit 068319e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/main/scala/chapter1.scala b/src/main/scala/chapter1.scala
@@ -88,7 +88,7 @@ object Runner {
 
 final class IO[A] private (val interpret: () => A) {
   def map[B](f: A => B): IO[B]         = IO(f(interpret()))
-  def flatMap[B](f: A => IO[B]): IO[B] = f(interpret())
+  def flatMap[B](f: A => IO[B]): IO[B] = IO(f(interpret()).interpret())
 }
 object IO {
   def apply[A](a: =>A): IO[A] = new IO(() => a)