https://github.com/staltz/callbag-to-async-iterable

👜 Convert any pullable callbag source to an AsyncIterable
https://github.com/staltz/callbag-to-async-iterable

Last synced: 5 days ago
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👜 Convert any pullable callbag source to an AsyncIterable

• Host: GitHub
• URL: https://github.com/staltz/callbag-to-async-iterable
• Owner: staltz
• License: mit
• Created: 2018-02-10T20:11:02.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-05-30T13:08:40.000Z (over 6 years ago)
• Last Synced: 2024-12-21T08:45:11.965Z (23 days ago)
• Language: JavaScript
• Homepage:
• Size: 6.84 KB
• Stars: 8
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - to-async-iterable

README

        
# callbag-to-async-iterable

Convert any pullable callbag source to an AsyncIterable (`async function*`).

**NOTE:** uses [async iterators](https://github.com/tc39/proposal-async-iteration) from ES2018, which are known to only work in Node.js v10, Firefox 57+, and Edge 16.

Copy file `ff-example.js` and paste it in Firefox's console to see a successful run.

`npm install callbag-to-async-iterable`

## Example

```js

const {pipe, filter, take} = require('callbag-basics');

const toAsyncIterable = require('callbag-to-async-iterable');

function pullableAsyncSource(start, sink) {

  if (start !== 0) return;

  let i = 0;

  sink(0, t => {

    if (t === 1) {

      setTimeout(() => { sink(1, i++) }, 1000);

    }

  });

}

async function main() {

  const nums = pipe(

    pullableAsyncSource,

    filter(i => i % 2),

    take(5),

    toAsyncIterable

  );

  for await (let x of nums) {

    console.log(x);

  }

}

main();

// 1

// 3

// 5

// 7

// 9

```