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lens

Lenses, Folds, and Traversals - Join us on web.libera.chat #haskell-lens

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Tech stack & purpose

The lens project is a Haskell library that provides families of optics—lenses, isomorphisms, folds, traversals, getters, and setters—for functional data manipulation and access. The library enables composable, type-safe approaches to reading from, writing to, and transforming nested data structures, and includes automatic derivation of optics for user-defined data types. Edward Kmett created and maintains the project, with community discussion occurring on the #haskell-lens IRC channel.

Community & reference links

Languages

Haskell
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Shell
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Contributors (top 30 of 174)