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Lenses are a way to easily access record fields.
Furthermore, see the packages in the category Lenses on Hackage
- basic lens operator examples
- Getting Started with Lenses
- Haskell for all: Lenses
- Haskell for all: Program imperatively using Haskell lenses
- Lenses: compositional data access and manipulation, a podcast of Simon Peyton Jones talking about lenses
- Why I don’t like the lens library
- CCC #23: Picking a lens library
- Musings on Lens