[fp_in_js] Applicative, Map, Bind

Applicative

ap :: forall f a b. f (a -> b) -> f a -> fb

Map

• parallel

map :: forall f a b. (a -> b) -> f a -> fb

Bind

• sequence

// 아래는 flipped 된 bind
bind :: forall m a b. (a -> m b) -> m a -> m b

reference