Skip to content

Revert "Removed ' e' typo" #161

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

Merged
milesfrain merged 1 commit into from
May 26, 2020
Merged

Revert "Removed ' e' typo" #161

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
2 changes: 1 addition & 1 deletion text/chapter8.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -302,7 +302,7 @@ ap mf ma = do

If `m` is a law-abiding member of the `Monad` type class, then there is a valid `Applicative` instance for `m` given by `ap`.

The interested reader can check that `ap` agrees with `apply` for the monads we have already encountered: `Array`, `Maybe` and `Either`.
The interested reader can check that `ap` agrees with `apply` for the monads we have already encountered: `Array`, `Maybe` and `Either e`.

If every monad is also an applicative functor, then we should be able to apply our intuition for applicative functors to every monad. In particular, we can reasonably expect a monad to correspond, in some sense, to programming "in a larger language" augmented with some set of additional side-effects. We should be able to lift functions of arbitrary arities, using `map` and `apply`, into this new language.

Expand Down