https://github.com/kevinsuttle/es-functional-mode-proposal

Proposal to enable opting JS into operating as a functional language
https://github.com/kevinsuttle/es-functional-mode-proposal

functional-languages javascript proposal tc39

Last synced: 5 days ago
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Proposal to enable opting JS into operating as a functional language

• Host: GitHub
• URL: https://github.com/kevinsuttle/es-functional-mode-proposal
• Owner: kevinSuttle
• Created: 2016-09-19T17:03:09.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2016-09-23T04:07:38.000Z (about 8 years ago)
• Last Synced: 2024-10-30T00:38:09.150Z (about 2 months ago)
• Topics: functional-languages, javascript, proposal, tc39
• Size: 4.88 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# es-functional-mode-proposal

Proposal to enable opting JS into operating as a functional language

See ['use strict'](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode) for an idea of where this is heading.

Helpful plugin to simulate

https://github.com/bodil/eslint-config-cleanjs

## Major points

### Strong-typing

TypeScript, Flow, Elm, and others agree that strong-typing provides safety and predictability.

- https://github.com/flowtype/flow-typed

- https://github.com/DefinitelyTyped/DefinitelyTyped/

- http://elm-lang.org

### Immutable data structures

- TypeScript 2.0 has a [readonly modifier](https://blogs.msdn.microsoft.com/typescript/2016/09/22/announcing-typescript-2-0/#the-readonly-modifier)

### Pure functions

JavaScript is [context-sensitive](http://staltz.com/is-your-javascript-function-actually-pure.html) when it comes to function purity.

### Expressions > statements

### No null or undefined

- TypeScript 2.0 has [non-nullable types](https://blogs.msdn.microsoft.com/typescript/2016/09/22/announcing-typescript-2-0/#non-nullable-types)

- Flow has [`Maybe` types](https://flowtype.org/docs/nullable-types.html#_)

- Elm has [`Maybe` types](https://guide.elm-lang.org/error_handling/maybe.html)