[Haskell-cafe] Lenses and Nested Maps
david.feuer at gmail.com
Tue Jun 18 03:55:23 UTC 2019
The main lensy tools for maps are the At and Ixed classes, both found in
On Mon, Jun 17, 2019, 11:45 PM Henry Laxen <nadine.and.henry at pobox.com>
> Hi Cafe,
> Suppose I have:
> s :: Map String (Map Int Char)
> s = M.fromList [("alice", M.fromList [(5,'a')]), ("bob", M.fromList
> Is there any way to modify the 'b' entry easily using lenses?
> Thanks in advance.
> Best wishes,
> Henry Laxen
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