| Portability | non-portable |
|---|---|
| Stability | provisional |
| Maintainer | Edward Kmett <ekmett@gmail.com> |
| Safe Haskell | Trustworthy |
Data.Vector.Lens
Description
This module provides lenses and traversals for working with generic vectors.
Documentation
toVectorOf :: Getting (Endo [a]) s a -> s -> Vector aSource
Isomorphisms
vector :: Iso [a] [b] (Vector a) (Vector b)Source
Convert a list to a Vector (or back)
>>>[1,2,3] ^. vectorfromList [1,2,3]
>>>[1,2,3] ^. vector . from vector[1,2,3]
>>>Vector.fromList [0,8,15] ^. from vector . vectorfromList [0,8,15]
forced :: Iso (Vector a) (Vector b) (Vector a) (Vector b)Source
Convert a Vector to a version that doesn't retain any extra
memory.
Lenses
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 5fromList [3,4,5,6,7]
>>>Vector.fromList [1..10] & sliced 2 5 . mapped .~ 0fromList [1,2,0,0,0,0,0,8,9,10]
Traversal of individual indices
ordinals :: [Int] -> IndexedTraversal' Int (Vector a) aSource
This Traversal will ignore any duplicates in the supplied list
of indices.
>>>toListOf (ordinals [1,3,2,5,9,10]) $ Vector.fromList [2,4..40][4,8,6,12,20,22]