https://github.com/freckle/nonempty-zipper

A non-empty comonadic list zipper
https://github.com/freckle/nonempty-zipper

comonads datastructures ghvm-managed haskell list

Last synced: 14 days ago
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A non-empty comonadic list zipper

• Host: GitHub
• URL: https://github.com/freckle/nonempty-zipper
• Owner: freckle
• License: mit
• Created: 2017-12-22T22:27:33.000Z (over 8 years ago)
• Default Branch: main
• Last Pushed: 2025-12-15T17:09:42.000Z (3 months ago)
• Last Synced: 2025-12-18T23:33:03.570Z (3 months ago)
• Topics: comonads, datastructures, ghvm-managed, haskell, list
• Language: Haskell
• Homepage:
• Size: 47.9 KB
• Stars: 7
• Watchers: 16
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

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README

          
# nonempty-zipper

A non-empty comonadic list zipper

## Why not another Zipper implementation?

A [Hoogle search][hoogle-search] reveals various implementations of zippers.

The two that have the most similar feature sets to `nonempty-zipper` are

[list-zipper][list-zipper] and [non-empty-zipper][non-empty-zipper].

[list-zipper][list-zipper] has a solid lens interface, and a ton of instances,

however it's lacking documentation and an `NFData` instance.

[non-empty-zipper][non-empty-zipper] is most similar to this package but it

appears to be unmaintained (e.g. `base` has drifted).

  [hoogle-search]: https://hoogle.haskell.org/?hoogle=zipper

  [list-zipper]: https://hackage.haskell.org/package/list-zipper

  [non-empty-zipper]: https://hackage.haskell.org/package/non-empty-zipper