Deque.Lazy

Definitions of lazy Deque.

The typical toList and fromList conversions are provided by means of the Foldable and IsList instances.

Documentation

data Deque a

Lazy double-ended queue (aka Dequeue or Deque) based on head-tail linked list.

Instances

MonadFail Deque

Defined in Deque.Lazy.Defs

Methods

fail :: String -> Deque a

Foldable Deque

Defined in Deque.Lazy.Defs

Methods

fold :: Monoid m => Deque m -> m

foldMap :: Monoid m => (a -> m) -> Deque a -> m

foldMap' :: Monoid m => (a -> m) -> Deque a -> m

foldr :: (a -> b -> b) -> b -> Deque a -> b

foldr' :: (a -> b -> b) -> b -> Deque a -> b

foldl :: (b -> a -> b) -> b -> Deque a -> b

foldl' :: (b -> a -> b) -> b -> Deque a -> b

foldr1 :: (a -> a -> a) -> Deque a -> a

foldl1 :: (a -> a -> a) -> Deque a -> a

toList :: Deque a -> [a]

null :: Deque a -> Bool

length :: Deque a -> Int

elem :: Eq a => a -> Deque a -> Bool

maximum :: Ord a => Deque a -> a

minimum :: Ord a => Deque a -> a

sum :: Num a => Deque a -> a

product :: Num a => Deque a -> a

Traversable Deque

Defined in Deque.Lazy.Defs

Methods

traverse :: Applicative f => (a -> f b) -> Deque a -> f (Deque b)

sequenceA :: Applicative f => Deque (f a) -> f (Deque a)

mapM :: Monad m => (a -> m b) -> Deque a -> m (Deque b)

sequence :: Monad m => Deque (m a) -> m (Deque a)

Alternative Deque

Defined in Deque.Lazy.Defs

Methods

empty :: Deque a

(<|>) :: Deque a -> Deque a -> Deque a

some :: Deque a -> Deque [a]

many :: Deque a -> Deque [a]

Applicative Deque

Defined in Deque.Lazy.Defs

Methods

pure :: a -> Deque a

(<*>) :: Deque (a -> b) -> Deque a -> Deque b

liftA2 :: (a -> b -> c) -> Deque a -> Deque b -> Deque c

(*>) :: Deque a -> Deque b -> Deque b

(<*) :: Deque a -> Deque b -> Deque a

Functor Deque

Defined in Deque.Lazy.Defs

Methods

fmap :: (a -> b) -> Deque a -> Deque b

(<$) :: a -> Deque b -> Deque a

Monad Deque

Defined in Deque.Lazy.Defs

Methods

(>>=) :: Deque a -> (a -> Deque b) -> Deque b

(>>) :: Deque a -> Deque b -> Deque b

return :: a -> Deque a

MonadPlus Deque

Defined in Deque.Lazy.Defs

Methods

mzero :: Deque a

mplus :: Deque a -> Deque a -> Deque a

NFData1 Deque

Defined in Deque.Lazy.Defs

Methods

liftRnf :: (a -> ()) -> Deque a -> ()

Generic1 Deque

Defined in Deque.Lazy.Defs

Associated Types

type Rep1 Deque :: k -> Type

Methods

from1 :: forall (a :: k). Deque a -> Rep1 Deque a

to1 :: forall (a :: k). Rep1 Deque a -> Deque a

Monoid (Deque a)

Defined in Deque.Lazy.Defs

Methods

mempty :: Deque a

mappend :: Deque a -> Deque a -> Deque a

mconcat :: [Deque a] -> Deque a

Semigroup (Deque a)

Defined in Deque.Lazy.Defs

Methods

(<>) :: Deque a -> Deque a -> Deque a

sconcat :: NonEmpty (Deque a) -> Deque a

stimes :: Integral b => b -> Deque a -> Deque a

IsList (Deque a)

\(\mathcal{O}(1)\).

Defined in Deque.Lazy.Defs

Associated Types

type Item (Deque a)

Methods

fromList :: [Item (Deque a)] -> Deque a

fromListN :: Int -> [Item (Deque a)] -> Deque a

toList :: Deque a -> [Item (Deque a)]

Generic (Deque a)

Defined in Deque.Lazy.Defs

Associated Types

type Rep (Deque a) :: Type -> Type

Methods

from :: Deque a -> Rep (Deque a) x

to :: Rep (Deque a) x -> Deque a

Show a => Show (Deque a)

Defined in Deque.Lazy.Defs

Methods

showsPrec :: Int -> Deque a -> ShowS

show :: Deque a -> String

showList :: [Deque a] -> ShowS

NFData a => NFData (Deque a)

Defined in Deque.Lazy.Defs

Methods

rnf :: Deque a -> ()

Eq a => Eq (Deque a)

Defined in Deque.Lazy.Defs

Methods

(==) :: Deque a -> Deque a -> Bool

(/=) :: Deque a -> Deque a -> Bool

Hashable a => Hashable (Deque a)

Defined in Deque.Lazy.Defs

Methods

hashWithSalt :: Int -> Deque a -> Int

hash :: Deque a -> Int

type Rep1 Deque

Defined in Deque.Lazy.Defs

type Rep1 Deque = D1 ('MetaData "Deque" "Deque.Lazy.Defs" "deque-0.4.4.1-AXJKR4g173k8gPaxixerqY" 'False) (C1 ('MetaCons "Deque" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec1 []) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec1 [])))

type Item (Deque a)

Defined in Deque.Lazy.Defs

type Item (Deque a) = a

type Rep (Deque a)

Defined in Deque.Lazy.Defs

type Rep (Deque a) = D1 ('MetaData "Deque" "Deque.Lazy.Defs" "deque-0.4.4.1-AXJKR4g173k8gPaxixerqY" 'False) (C1 ('MetaCons "Deque" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [a]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [a])))

fromStrict :: Deque a -> Deque a

Convert strict deque to lazy deque.

toStrict :: Deque a -> Deque a

Convert lazy deque to strict deque.

fromConsAndSnocLists :: [a] -> [a] -> Deque a

\(\mathcal{O}(1)\). Construct from cons and snoc lists.

cons :: a -> Deque a -> Deque a

\(\mathcal{O}(1)\). Add element in the beginning.

snoc :: a -> Deque a -> Deque a

\(\mathcal{O}(1)\). Add element in the ending.

reverse :: Deque a -> Deque a

\(\mathcal{O}(1)\). Reverse the deque.

shiftLeft :: Deque a -> Deque a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Move the first element to the end.

λ toList . shiftLeft $ fromList [1,2,3]
[2,3,1]

shiftRight :: Deque a -> Deque a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Move the last element to the beginning.

λ toList . shiftRight $ fromList [1,2,3]
[3,1,2]

filter :: (a -> Bool) -> Deque a -> Deque a

\(\mathcal{O}(n)\). Leave only the elements satisfying the predicate.

take :: Int -> Deque a -> Deque a

\(\mathcal{O}(n)\). Leave only the specified amount of first elements.

drop :: Int -> Deque a -> Deque a

\(\mathcal{O}(n)\). Drop the specified amount of first elements.

takeWhile :: (a -> Bool) -> Deque a -> Deque a

\(\mathcal{O}(n)\). Leave only the first elements satisfying the predicate.

dropWhile :: (a -> Bool) -> Deque a -> Deque a

\(\mathcal{O}(n)\). Drop the first elements satisfying the predicate.

span :: (a -> Bool) -> Deque a -> (Deque a, Deque a)

\(\mathcal{O}(n)\). Perform takeWhile and dropWhile in a single operation.

uncons :: Deque a -> Maybe (a, Deque a)

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Get the first element and deque without it if it's not empty.

unsnoc :: Deque a -> Maybe (a, Deque a)

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Get the last element and deque without it if it's not empty.

null :: Deque a -> Bool

\(\mathcal{O}(1)\). Check whether deque is empty.

head :: Deque a -> Maybe a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Get the first element if deque is not empty.

last :: Deque a -> Maybe a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Get the last element if deque is not empty.

tail :: Deque a -> Deque a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Keep all elements but the first one.

In case of empty deque returns an empty deque.

init :: Deque a -> Deque a

\(\mathcal{O}(1)\), occasionally \(\mathcal{O}(n)\). Keep all elements but the last one.

In case of empty deque returns an empty deque.