Data.LineString

Refer to the GeoJSON Spec http://geojson.org/geojson-spec.html#linestring

A LinearString is a List with at least 2 elements

Type

data LineString a

a LineString has at least 2 elements

Instances

Functor LineString

Methods

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

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

Foldable LineString

This instance of Foldable will run through the entire ring, closing the loop by also passing the initial element in again at the end.

Methods

fold :: Monoid m => LineString m -> m

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

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

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

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

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

foldr1 :: (a -> a -> a) -> LineString a -> a

foldl1 :: (a -> a -> a) -> LineString a -> a

toList :: LineString a -> [a]

null :: LineString a -> Bool

length :: LineString a -> Int

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

maximum :: Ord a => LineString a -> a

minimum :: Ord a => LineString a -> a

sum :: Num a => LineString a -> a

product :: Num a => LineString a -> a

Traversable LineString

Methods

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

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

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

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

Eq a => Eq (LineString a)

Methods

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

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

Show a => Show (LineString a)

Methods

showsPrec :: Int -> LineString a -> ShowS

show :: LineString a -> String

showList :: [LineString a] -> ShowS

ToJSON a => ToJSON (LineString a)

Methods

toJSON :: LineString a -> Value

toEncoding :: LineString a -> Encoding

toJSONList :: [LineString a] -> Value

toEncodingList :: [LineString a] -> Encoding

(FromJSON a, Show a) => FromJSON (LineString a)

Methods

parseJSON :: Value -> Parser (LineString a)

parseJSONList :: Value -> Parser [LineString a]

data ListToLineStringError

When converting a List to a LineString, here is a list of things that can go wrong:

• The list was empty
• The list only had one element

Constructors

ListEmpty

SingletonList

Instances

Eq ListToLineStringError

Methods

(==) :: ListToLineStringError -> ListToLineStringError -> Bool

(/=) :: ListToLineStringError -> ListToLineStringError -> Bool

Show ListToLineStringError

Methods

showsPrec :: Int -> ListToLineStringError -> ShowS

show :: ListToLineStringError -> String

showList :: [ListToLineStringError] -> ShowS

Functions

fromLineString :: LineString a -> [a]

This function converts it into a list and appends the given element to the end.

fromList :: Validate v => [a] -> v ListToLineStringError (LineString a)

creates a LineString out of a list of elements, if there are enough elements (needs at least 2) elements

makeLineString

Arguments

:: a

The first element

-> a

The second element

-> [a]

The rest of the optional elements

-> LineString a

Creates a LineString makeLineString x y zs creates a LineString homomorphic to the list [x, y] ++ zs

lineStringHead :: LineString a -> a

returns the element at the head of the string

lineStringLast :: LineString a -> a

returns the last element in the string

lineStringLength :: LineString a -> Int

returns the number of elements in the list, including the replicated element at the end of the list.