https://github.com/staltz/callbag-for-each

👜 Callbag sink that consume both pullable and listenable sources
https://github.com/staltz/callbag-for-each

Last synced: about 2 months ago
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👜 Callbag sink that consume both pullable and listenable sources

• Host: GitHub
• URL: https://github.com/staltz/callbag-for-each
• Owner: staltz
• License: mit
• Created: 2018-02-03T11:35:02.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-12-25T18:39:34.000Z (over 5 years ago)
• Last Synced: 2024-07-21T01:42:49.182Z (2 months ago)
• Language: JavaScript
• Homepage:
• Size: 8.79 KB
• Stars: 11
• Watchers: 3
• Forks: 6
• Open Issues: 1
• Metadata Files:
  • Readme: readme.js
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - for-each

README

        
/**

 * callbag-for-each

 * ----------------

 *

 * Callbag sink that consume both pullable and listenable sources. When called

 * on a pullable source, it will iterate through its data. When called on a

 * listenable source, it will observe its data.

 *

 * `npm install callbag-for-each`

 *

 * Examples

 * --------

 *

 * Consume a pullable source:

 *

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

 *     const forEach = require('callbag-for-each');

 *

 *     const source = fromIter([10,20,30,40])

 *

 *     forEach(x => console.log(x))(source); // 10

 *                                           // 20

 *                                           // 30

 *                                           // 40

 *

 * Consume a listenable source:

 *

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

 *     const forEach = require('callbag-for-each');

 *

 *     const source = interval(1000);

 *

 *     forEach(x => console.log(x))(source); // 0

 *                                           // 1

 *                                           // 2

 *                                           // 3

 *                                           // ...

 */

const forEach = operation => source => {

  let talkback;

  source(0, (t, d) => {

    if (t === 0) talkback = d;

    if (t === 1) operation(d);

    if (t === 1 || t === 0) talkback(1);

  });

};

module.exports = forEach;