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Updated for changes in prelude. #3

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Apr 23, 2014
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1 change: 1 addition & 0 deletions .gitignore
Original file line number Diff line number Diff line change
Expand Up @@ -2,3 +2,4 @@
/externs/
/node_modules/
/bower_components/
/output/
18 changes: 0 additions & 18 deletions src/Control/Applicative.purs

This file was deleted.

25 changes: 25 additions & 0 deletions src/Control/Apply.purs
Original file line number Diff line number Diff line change
@@ -0,0 +1,25 @@
module Control.Apply where

infixl 4 <*
infixl 4 *>

(<*) :: forall a b f. (Apply f) => f a -> f b -> f a
(<*) a b = const <$> a <*> b

(*>) :: forall a b f. (Apply f) => f a -> f b -> f b
(*>) a b = const id <$> a <*> b

lift2 :: forall a b c f. (Apply f) => (a -> b -> c) -> f a -> f b -> f c
lift2 f a b = f <$> a <*> b

lift3 :: forall a b c d f. (Apply f) => (a -> b -> c -> d) -> f a -> f b -> f c -> f d
lift3 f a b c = f <$> a <*> b <*> c

lift4 :: forall a b c d e f. (Apply f) => (a -> b -> c -> d -> e) -> f a -> f b -> f c -> f d -> f e
lift4 f a b c d = f <$> a <*> b <*> c <*> d

lift5 :: forall a b c d e f g. (Apply f) => (a -> b -> c -> d -> e -> g) -> f a -> f b -> f c -> f d -> f e -> f g
lift5 f a b c d e = f <$> a <*> b <*> c <*> d <*> e

forever :: forall a b f. (Apply f) => f a -> f b
forever a = a *> forever a
20 changes: 20 additions & 0 deletions src/Control/Bind.purs
Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
module Control.Bind where

infixr 1 =<<
infixr 1 >=>
infixr 1 <=<

(=<<) :: forall a b m. (Bind m) => (a -> m b) -> m a -> m b
(=<<) f m = m >>= f

(>=>) :: forall a b c m. (Bind m) => (a -> m b) -> (b -> m c) -> a -> m c
(>=>) f g a = f a >>= g

(<=<) :: forall a b c m. (Bind m) => (b -> m c) -> (a -> m b) -> a -> m c
(<=<) f g a = f =<< g a

join :: forall a m. (Bind m) => m (m a) -> m a
join m = m >>= id

ifM :: forall a m. (Bind m) => m Boolean -> m a -> m a -> m a
ifM cond t f = cond >>= \cond' -> if cond' then t else f
23 changes: 4 additions & 19 deletions src/Control/Monad.purs
Original file line number Diff line number Diff line change
@@ -1,35 +1,20 @@
module Control.Monad where

import Prelude
import Data.Array

replicateM :: forall m a. (Monad m) => Number -> m a -> m [a]
replicateM 0 _ = return []
replicateM n m = do
a <- m
as <- replicateM (n - 1) m
return (a : as)

infixr 1 >=>
infixr 1 <=<

(>=>) :: forall m a b c. (Monad m) => (a -> m b) -> (b -> m c) -> a -> m c
(>=>) f g a = do
b <- f a
g b

(<=<) :: forall m a b c. (Monad m) => (b -> m c) -> (a -> m b) -> a -> m c
(<=<) = flip (>=>)

join :: forall m a. (Monad m) => m (m a) -> m a
join mm = do
m <- mm
m

foldM :: forall m a b. (Monad m) => (a -> b -> m a) -> a -> [b] -> m a
foldM _ a [] = return a
foldM f a (b:bs) = f a b >>= \a' -> foldM f a' bs

when :: forall m. (Monad m) => Boolean -> m {} -> m {}
when true m = m
when false _ = return {}

unless :: forall m. (Monad m) => Boolean -> m {} -> m {}
unless false m = m
unless true _ = return {}