https://github.com/mfelsche/pony-maybe

Utilities for working with optional values in Pony :horse: :no_entry_sign:
https://github.com/mfelsche/pony-maybe

optional pony-language ponylang

Last synced: about 2 months ago
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Utilities for working with optional values in Pony :horse: :no_entry_sign:

• Host: GitHub
• URL: https://github.com/mfelsche/pony-maybe
• Owner: mfelsche
• Created: 2018-11-22T12:59:27.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2020-04-20T08:23:37.000Z (about 5 years ago)
• Last Synced: 2025-01-20T04:18:52.638Z (3 months ago)
• Topics: optional, pony-language, ponylang
• Language: Pony
• Homepage:
• Size: 9.77 KB
• Stars: 6
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • Code of conduct: CODE_OF_CONDUCT.md

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README

        
# pony-maybe

Utilities for handling optional data in Pony.

## Status

[![CircleCI](https://circleci.com/gh/mfelsche/pony-maybe.svg?style=svg)](https://circleci.com/gh/mfelsche/pony-maybe)

## Installation

* Install [pony-stable](https://github.com/ponylang/pony-stable)

* Update your `bundle.json`

```json

{ 

  "type": "github",

  "repo": "mfelsche/pony-maybe"

}

```

* `stable fetch` to fetch your dependencies

* `use "maybe"` to include this package

* `stable env ponyc` to compile your application

## Usage

```pony

use "maybe"

class WithOptionalStuff

  let _stuff: Maybe[String] = None

  fun update_stuff(new_stuff: String): Maybe[String] =>

    _stuff = new_stuff

  fun size(): USize =>

    Opt.get[USize](

      Opt.map[String, USize](_stuff, {(s) => s.size() }),

      0

    )

```