components/src/Yoga/Helpers.purs · rowtype-yoga/psfp

git.iko.soy/rowtype-yoga/psfp

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1module Yoga.Helpers where

3import Prelude

4import Data.Array (head, tail, (:))

5import Data.Maybe (Maybe(..), fromMaybe)

7fromMaybeFlipped ∷ ∀ a. Maybe a -> a -> a

8fromMaybeFlipped = flip fromMaybe

10infixr 5 fromMaybeFlipped as ?||

12ifJustTrue ∷ ∀ m. Monoid m => Maybe Boolean -> m -> m

13ifJustTrue option value = if option == Just true then value else mempty

15ifJustFalse ∷ ∀ m. Monoid m => Maybe Boolean -> m -> m

16ifJustFalse option value = if option == Just false then value else mempty

18intersperse ∷ ∀ a. a -> Array a -> Array a

19intersperse sep xs = case head xs, tail xs ?|| [] of

20 Nothing, _ -> []

21 Just x, xs' -> x : prependToAll sep xs'

23prependToAll ∷ ∀ a. a -> Array a -> Array a

24prependToAll sep xs = case head xs, tail xs ?|| [] of

25 Nothing, _ -> []

26 Just x, xs' -> sep : x : prependToAll sep xs'