Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Adding solution with ensureOr to MonadError exercise #204

Open
wants to merge 1 commit into
base: develop
Choose a base branch
from
Open

Adding solution with ensureOr to MonadError exercise #204

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 12 additions & 0 deletions src/pages/monads/monad-error.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -213,4 +213,16 @@ def validateAdult[F[_]](age: Int)(implicit me: MonadError[F, Throwable]): F[Int]
if(age >= 18) age.pure[F]
else new IllegalArgumentException("Age must be greater than or equal to 18").raiseError[F, Int]
```

Another way of solving it is using `pure` and `ensure`.

```scala mdoc:invisible:reset-object
import cats.MonadError
import cats.implicits._
```

```scala mdoc:silent
def validateAdult[F[_]](age: Int)(implicit me: MonadError[F, Throwable]): F[Int] =
age.pure[F].ensure(new IllegalArgumentException("Age must be greater than or equal to 18"))(_ >= 18)
```
</div>