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lachezar/IO.scala

Last active November 21, 2023 13:20
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IO implementation exercise
Raw
IO.scala
case class IO[A](unsafeRun: () => A):
def map[B](f: A => B): IO[B] =
IO(() => f(unsafeRun()))
def flatMap[B](f: A => IO[B]): IO[B] =
IO(() => f(unsafeRun()).unsafeRun())
val io: IO[Int] = IO(() => {
println("Running side effect!!!")
42
})
io.unsafeRun()
io.flatMap(_ => io.flatMap(_ => io)).unsafeRun()
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