https://github.com/guid75/ziplist

A simple Elm zipper implementation
https://github.com/guid75/ziplist

elm zipper

Last synced: 26 days ago
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A simple Elm zipper implementation

• Host: GitHub
• URL: https://github.com/guid75/ziplist
• Owner: Guid75
• License: bsd-3-clause
• Created: 2017-06-16T15:59:53.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-05-13T07:12:23.000Z (over 5 years ago)
• Last Synced: 2024-10-21T18:21:14.179Z (2 months ago)
• Topics: elm, zipper
• Language: Elm
• Homepage: http://package.elm-lang.org/packages/Guid75/ziplist/latest
• Size: 6.84 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# ziplist

A ZipList is a type of collection in which you can move a pointer on a current element forwards or backwards.

Here is a simple example:

```elm

import ZipList exposing (..)

zlist : ZipList.ZipList Number

zlist = ZipList.fromList [1, 2, 3] -- this ziplist points on the first element (1) after creation

a : Maybe Number

a = ZipList.current zlist -- worth Just 1

b : Maybe Number

b =

    zlist

        |> ZipList.forward

        |> ZipList.forward

        |> ZipList.current -- worth Just 3

list = ZipList.toList zlist -- worth [1, 2, 3]

```