Modulelens-5.3.6Haskell2010

Data.Vector.Lens

This module provides lenses and traversals for working with generic vectors.

Contents

Synopsis

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

Similar to toListOf, but returning a Vector.

Example1 expression

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

Isomorphisms

valuevector

Convert a list to a Vector (or back)

Example1 expression

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

Example1 expression

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

Example1 expression

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

valueforced

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

valuesliced

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.

Example1 expression

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

Example1 expression

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

valueordinals :: [Int] -> IndexedTraversal' Int (Vector a) a

This Traversal will ignore any duplicates in the supplied list of indices.

Example1 expression

>>> toListOf (ordinals [1,3,2,5,9,10]) $ Vector.fromList [2,4..40][4,8,6,12,20,22]