| Portability | MPTCs, Rank2Types, LiberalTypeSynonyms |
|---|---|
| Stability | provisional |
| Maintainer | Edward Kmett <ekmett@gmail.com> |
| Safe Haskell | Safe-Inferred |
Data.Array.Lens
Contents
Description
- ixmapped :: (IArray a e, Ix i, Ix j) => (i, i) -> IndexPreservingSetter (a j e) (a i e) i j
Setters
ixmapped :: (IArray a e, Ix i, Ix j) => (i, i) -> IndexPreservingSetter (a j e) (a i e) i jSource
This setter can be used to derive a new IArray from an old IAarray by
applying a function to each of the indices to look it up in the old IArray.
This is a contravariant Setter.
ixmap≡over.ixmappedixmapped≡setting.ixmapover(ixmappedb) f arr!i ≡ arr!f ibounds(over(ixmappedb) f arr) ≡ b