Effect

data Effect t0

A native effect. The type parameter denotes the return type of running the effect, that is, an Effect Int is a possibly-effectful computation which eventually produces a value of the type Int when it finishes.

Instances

• Functor Effect
• Apply Effect
• Applicative Effect
• Bind Effect
• Monad Effect
• (Semigroup a) => Semigroup (Effect a)

  The Semigroup instance for effects allows you to run two effects, one after the other, and then combine their results using the result type's Semigroup instance.

• (Monoid a) => Monoid (Effect a)

  If you have a Monoid a instance, then mempty :: Effect a is defined as pure mempty.

untilE :: Effect Boolean -> Effect Unit

Loop until a condition becomes true.

untilE b is an effectful computation which repeatedly runs the effectful computation b, until its return value is true.

whileE :: forall a. Effect Boolean -> Effect a -> Effect Unit

Loop while a condition is true.

whileE b m is effectful computation which runs the effectful computation b. If its result is true, it runs the effectful computation m and loops. If not, the computation ends.

forE :: Int -> Int -> (Int -> Effect Unit) -> Effect Unit

Loop over a consecutive collection of numbers.

forE lo hi f runs the computation returned by the function f for each of the inputs between lo (inclusive) and hi (exclusive).

foreachE :: forall a. Array a -> (a -> Effect Unit) -> Effect Unit

Loop over an array of values.

foreachE xs f runs the computation returned by the function f for each of the inputs xs.