https://github.com/staltz/callbag-flatten

👜 Callbag operator that flattens a higher-order callbag source
https://github.com/staltz/callbag-flatten

Last synced: 5 days ago
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👜 Callbag operator that flattens a higher-order callbag source

• Host: GitHub
• URL: https://github.com/staltz/callbag-flatten
• Owner: staltz
• License: mit
• Created: 2018-02-01T15:37:08.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2023-04-20T07:01:29.000Z (over 1 year ago)
• Last Synced: 2024-12-18T20:48:15.421Z (26 days ago)
• Language: JavaScript
• Homepage:
• Size: 36.1 KB
• Stars: 7
• Watchers: 3
• Forks: 3
• Open Issues: 2
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - flatten

README

        
# callbag-flatten

Callbag operator that flattens a higher-order callbag source. Like RxJS "switch" or xstream "flatten". Use it with `map` to get behavior equivalent to "switchMap". Works on either pullable or listenable sources.

`npm install callbag-flatten`

## examples

### listenables

On each mouse click, start a stopwatch ticking every second:

```js

const fromEvent = require('callbag-from-event');

const interval = require('callbag-interval');

const flatten = require('callbag-flatten');

const observe = require('callbag-observe');

const pipe = require('callbag-pipe');

const map = require('callbag-map');

const source = pipe(

  fromEvent(document, 'click'),

  map(() => interval(1000)),

  flatten,

  observe(x => console.log(x))

);

```

### pullables

Loop over two iterables (such as arrays) and combine their values together:

```js

const fromIter = require('callbag-from-iter');

const iterate = require('callbag-iterate');

const flatten = require('callbag-flatten');

const pipe = require('callbag-pipe');

const map = require('callbag-map');

const source = pipe(

  fromIter('hi'),

  map(char => pipe(

    fromIter([10, 20, 30]),

    map(num => char + num)

  )),

  flatten,

  iterate(x => console.log(x))

);

// h10

// h20

// h30

// i10

// i20

// i30

```