https://github.com/andre-dietrich/elm-conditional

Conditional application of functions to simplify piping.
https://github.com/andre-dietrich/elm-conditional

Last synced: 10 days ago
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Conditional application of functions to simplify piping.

• Host: GitHub
• URL: https://github.com/andre-dietrich/elm-conditional
• Owner: andre-dietrich
• License: bsd-3-clause
• Created: 2020-09-16T13:58:46.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-09-16T14:06:41.000Z (about 4 years ago)
• Last Synced: 2024-08-01T13:21:22.026Z (3 months ago)
• Language: Elm
• Size: 8.79 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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• awesome-ccamel - andre-dietrich/elm-conditional - Conditional application of functions to simplify piping. (Elm)

README

        
# elm-conditional

This Library contains a set of functions that are intended to simplify the

application of pipes when conditions are required. Instead of using multiple

if-else-statements, it is possible to pass the condition as the first parameter,

which defines if a functions gets executed or not.

Functions that have an `If` attached to their name, allow to define conditions

for  their applications. If the function-name ends with a `When`, then the

application of the passed function is based on a Maybe type and only gets

executed, if this parameter is not equal to Nothing.

``` elm

import Conditional as C

...

  let

    list = [1,2,3,4,5,6,7,8,9]

  in

  -- apply a function only if the first condition is met

  list

    |> C.apply2If (++) (List.length list > 5) 5

    |> (==) [5,1,2,3,4,5,6,7,8,9]

  -- apply a function only if the first parameter is not Nothing

  list

    |> C.apply2When (++) (Just 1000)

    |> (==) [1000,1,2,3,4,5,6,7,8,9]

```

The sub-modules contain a couple of functions that already abstract List or

String manipulation. So that you can also apply these functions directly without

any further if-else-statements.

``` elm

import Conditional.List as CList

...

  let

    list = [1,2,3,4,5,6,7,8,9]

  in

  list

    |> CList.mapIf (List.length list > 5) (\v -> v * v)

    |> CList.addIf (List.member 6 list) -99

    |> CList.attachIf (List.member 7 list) 99

    |> (==) [-99, 1, 4, 9, 16, 25, 36, 49, 62, 91, 99]

...

```