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Maybe

Enumerations

Maybe

(enum Maybe
	(Just x)
	Nothing)

Examples

(def foo (Just 99))
(def bar Nothing)

Functions

and_then

and_then :: (Any a) => Maybe a -> Lambda -> Maybe Value

Performs a lambda with the contained value of Just.

Arguments

  • optionnal :: Maybe a: The value to process.
  • callback :: Lambda: The callback to use.

Examples

(def foo (Just 99))
(and_then foo (λ (x) (Just (+ x 1)))) ;; (Just 100)
(def bar Nothing)
(and_then bar (λ (x) (Just (- x 1)))) ;; Nothing