# observable-linked-list

**Repository Path**: mirrors_regular/observable-linked-list

## Basic Information

- **Project Name**: observable-linked-list
- **Description**: observable for a linked list of objects
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-25
- **Last Updated**: 2026-05-17

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# observable-linked-list

Observable for a linked list. Subscribe to changes of any part of the chain of linked objects.

## API

`observable = oll(root, link, getObs)`

- `root` - the root of the chain, an observable
- `link` - function that extracts a link from an object. Links should be comparable with `==` (strings, numbers ...)
- `getObs` - called with result of `link()`, must return observable for the linked object.

## Example

``` js
const oll = require('observable-linked-list')
const Value = require('mutant/value')

const obs = {
  a: Value({link: 'b'}),
  b: Value('foo'),
  c: Value('baz')
}

const listObs = oll(obs.a, x => x.link, x => obs[x])
console.log(listObs()) // --> [ { link: 'b' }, 'foo' ]

listObs( list => {
  console.log(list)
})

obs.b.set('bar') // --> [ { link: 'b' }, 'bar' ]
obs.a.set({link: 'c'}) // --> [ { link: 'c' }, 'baz' ]
obs.c.set({link: 'b'}) // --> [ { link: 'c' }, { link: 'b' }, 'bar' ]
```