| Copyright | (C) 2012-15 Edward Kmett |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | Edward Kmett <ekmett@gmail.com> |
| Stability | provisional |
| Portability | non-portable |
| Safe Haskell | Trustworthy |
| Language | Haskell98 |
Data.Vector.Lens
Description
This module provides lenses and traversals for working with generic vectors.
Documentation
toVectorOf :: Getting (Endo [a]) s a -> s -> Vector a Source
Similar to toListOf, but returning a Vector.
>>>toVectorOf both (8,15)fromList [8,15]
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]