https://github.com/blu-j/ts-lens

https://github.com/blu-j/ts-lens

Last synced: 18 days ago
JSON representation

• Host: GitHub
• URL: https://github.com/blu-j/ts-lens
• Owner: Blu-J
• Created: 2017-09-29T14:40:21.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2024-11-01T12:22:11.000Z (2 months ago)
• Last Synced: 2024-11-08T17:05:04.116Z (about 2 months ago)
• Language: TypeScript
• Size: 1.46 MB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

Awesome Lists containing this project

README

        
# Lens

![Node.js CI](https://github.com/Blu-J/ts-lens/workflows/Node.js%20CI/badge.svg)

A lens is a getter/ setter for traversing a structure.

A lens is also composable with other lenses, allowing traversing via a object or using projections.

[functional-lenses](https://medium.com/@dtipson/functional-lenses-d1aba9e52254)

Realize that the only dependency is the Object.assign from es6

### Using

```ts

import { idLens } from 'ts-lens';

type MyShape = {

	a?:{

		b: {

			c: string

		}

	}

}

const withShape = idLens();

withShape.withAttrOr('a', { b: { c: ''}}).get({}) // ? { b: { c: ''}}

withShape.withAttrOr('a', { b: { c: ''}}).withAttr('b').withAttr('b').get({a:{

		b: {

			c: 'test

		}

	}}) // 'b'

```