planet-mitchell-0.0.0: Planet Mitchell

Safe HaskellNone
LanguageHaskell2010

Vector

Contents

Synopsis

Vector

module Data.Vector

Optics

toVectorOf :: Getting (Endo [a]) s a -> s -> Vector a #

Similar to toListOf, but returning a Vector.

>>> toVectorOf both (8,15) == Vector.fromList [8,15]
True

vector :: (Profunctor p, Functor f) => p (Vector a) (f (Vector b)) -> p [a] (f [b]) #

Convert a list to a Vector (or back)

>>> [1,2,3] ^. vector == Vector.fromList [1,2,3]
True

>>> [1,2,3] ^. vector . from vector
[1,2,3]

>>> Vector.fromList [0,8,15] ^. from vector . vector == Vector.fromList [0,8,15]
True

forced :: (Profunctor p, Functor f) => p (Vector a) (f (Vector b)) -> p (Vector a) (f (Vector b)) #

Convert a Vector to a version that doesn't retain any extra memory.

sliced #

Arguments

:: Int

i starting index

-> Int

n length

-> Lens' (Vector a) (Vector a) 

sliced i n provides a Lens that edits the n elements starting at index i from a Lens.

This is only a valid Lens if you do not change the length of the resulting Vector.

Attempting to return a longer or shorter vector will result in violations of the Lens laws.

>>> Vector.fromList [1..10] ^. sliced 2 5 == Vector.fromList [3,4,5,6,7]
True

>>> (Vector.fromList [1..10] & sliced 2 5 . mapped .~ 0) == Vector.fromList [1,2,0,0,0,0,0,8,9,10]
True