https://github.com/franciscotln/callbag-map-when

Callbag operator that maps over values that satisfies a predicate. AKA filterMap
https://github.com/franciscotln/callbag-map-when

Last synced: 3 months ago
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Callbag operator that maps over values that satisfies a predicate. AKA filterMap

• Host: GitHub
• URL: https://github.com/franciscotln/callbag-map-when
• Owner: franciscotln
• License: mit
• Created: 2018-03-18T11:26:47.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2022-04-09T06:00:26.000Z (almost 3 years ago)
• Last Synced: 2024-10-09T09:47:28.503Z (3 months ago)
• Language: JavaScript
• Size: 21.5 KB
• Stars: 5
• Watchers: 2
• Forks: 2
• Open Issues: 3
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - map-when

README

        
# callbag-map-when

Callbag operator that applies a transformation function only to items that satisfy the predicate function. Works as filter() followed by map() on either pullable or listenable sources.

`npm install callbag-map-when`

## Example

```js

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

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

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

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

pipe(

  fromIter([1, 2, 3, 4]),

  mapWhen(n => n % 2 === 0, n => n * 10),

  forEach((n) => {

    console.log(n); // 20

  })                // 40

);

```