https://github.com/rl-king/elm-index

A taggable wrapper around Int
https://github.com/rl-king/elm-index

array elm index list reorderable type

Last synced: about 1 month ago
JSON representation

A taggable wrapper around Int

• Host: GitHub
• URL: https://github.com/rl-king/elm-index
• Owner: rl-king
• License: bsd-3-clause
• Created: 2020-08-01T19:05:15.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-08-02T12:04:39.000Z (over 4 years ago)
• Last Synced: 2023-08-08T20:39:58.128Z (over 1 year ago)
• Topics: array, elm, index, list, reorderable, type
• Language: Elm
• Homepage: https://package.elm-lang.org/packages/rl-king/elm-index/latest/
• Size: 3.91 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# elm-index

Disambiguate between different `Index` types by taggging `Index a`.

``` elm

-- With an anonymous record.

type alias RecordIndex =

    Index { record : () }

-- You could use some type you already have.

type BlockContent

    = Text String

    | Image String

type alias BlockIndex =

    Index BlockContent

-- Or, if you don't want to write `Index a` everywhere.

type alias Index =

    Index ()

```

Replace `Int` with the `Index a` type.

``` elm

example : List ( Index { example : () }, String )

example =

    Index.indexedMap List.indexedMap

        Tuple.pair

        ["hallo", "hola", "hello"]

example : Array ( Index { example : () }, Int )

example =

    Index.indexedMap Array.indexedMap

        Tuple.pair

        (Array.fromList [1, 2, 3])

```

Make functions that expect an `Int` take an `Index a`.

``` elm

example : Index { example : () } -> Maybe Int

example index =

    Index.withIndex Array.get index <|

        Array.fromList [1, 2, 3]

```