https://github.com/franciscotln/callbag-drop-repeats

Callbag operator that Drops consecutive duplicate
https://github.com/franciscotln/callbag-drop-repeats

Last synced: 3 months ago
JSON representation

Callbag operator that Drops consecutive duplicate

• Host: GitHub
• URL: https://github.com/franciscotln/callbag-drop-repeats
• Owner: franciscotln
• License: mit
• Created: 2018-03-23T14:53:29.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2023-03-04T02:36:47.000Z (almost 2 years ago)
• Last Synced: 2024-10-20T13:42:54.402Z (3 months ago)
• Language: JavaScript
• Size: 23.4 KB
• Stars: 4
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - drop-repeats

README

        
# callbag-drop-repeats

Drops consecutive duplicate values. Works on either pullable or listenable sources.

Takes an optional custom predicate function.

If not provided then `(a, b) => a === b` will be used.

`npm install callbag-drop-repeats`

## Examples

### Listenables

```js

const dropRepeats = require('callbag-drop-repeats');

const { forEach, map, interval, pipe, take } = require('callbag-basics');

pipe(

  interval(1000),

  take(3),

  map(() => 'Always me, but once'),

  dropRepeats(),

  forEach((x) => {

    console.log(x); // 'Always me, but once'

  })

);

```

### Pullables

Without a predicate function:

```js

const dropRepeats = require('callbag-drop-repeats');

const { forEach, fromIter, pipe } = require('callbag-basics');

pipe(

  fromIter([0, 0, 0, 1]),

  dropRepeats(),

  forEach((x) => {

    console.log(x); // 0

  })                // 1

);

```

With a predicate function:

```js

const dropRepeats = require('callbag-drop-repeats');

const { forEach, fromIter, pipe } = require('callbag-basics');

pipe(

  fromIter([{ name: 'A' }, { name: 'A' }, { name: 'B' }]),

  dropRepeats((prev, curr) => prev.name === curr.name),

  forEach((x) => {

    console.log(x); // { name: 'A' }

  })                // { name: 'B' } 

);

```