https://github.com/derhuerst/callbag-keep-sequences

A callbag operator that passes through only sequences with minimum length.
https://github.com/derhuerst/callbag-keep-sequences

callbag dedupe filter sequence streak

Last synced: 8 months ago
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A callbag operator that passes through only sequences with minimum length.

• Host: GitHub
• URL: https://github.com/derhuerst/callbag-keep-sequences
• Owner: derhuerst
• License: isc
• Created: 2018-06-30T19:39:04.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2019-10-01T22:00:42.000Z (about 6 years ago)
• Last Synced: 2025-01-07T19:15:21.647Z (10 months ago)
• Topics: callbag, dedupe, filter, sequence, streak
• Language: JavaScript
• Homepage: https://github.com/derhuerst/callbag-keep-sequences#callbag-keep-sequences
• Size: 3.91 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: license.md

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README

          
# callbag-keep-sequences

**A [callbag](https://github.com/callbag/callbag#callbag-) operator that passes through only sequences with minimum length.**

```js

// minimum streak length = 3

1, 2, 2, 2, 2, 3, 3, 1, 1, 1, 3 // input

   2, 2, 2, 2,       1, 1, 1    // output

```

[![npm version](https://img.shields.io/npm/v/callbag-keep-sequences.svg)](https://www.npmjs.com/package/callbag-keep-sequences)

[![build status](https://api.travis-ci.org/derhuerst/callbag-keep-sequences.svg?branch=master)](https://travis-ci.org/derhuerst/callbag-keep-sequences)

![ISC-licensed](https://img.shields.io/github/license/derhuerst/callbag-keep-sequences.svg)

[![chat with me on Gitter](https://img.shields.io/badge/chat%20with%20me-on%20gitter-512e92.svg)](https://gitter.im/derhuerst)

[![support me on Patreon](https://img.shields.io/badge/support%20me-on%20patreon-fa7664.svg)](https://patreon.com/derhuerst)

## Installation

```shell

npm install callbag-keep-sequences

```

## Usage

```js

const pipe = require('callbag-pipe')

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

const keepSequences = require('callbag-keep-sequences')

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

pipe(

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

	keepSequences(2), // sequences with >= 2 items

	forEach(console.log)

)

// 2 2 2 2 1 1 1

```

## API

```js

keepSequences(n, compare = (a, b) => a === b)

```

## Related

- [callbag spec](https://github.com/callbag/callbag#callbag-) – 👜 A standard for JS callbacks that enables lightweight observables and iterables

- [`callbag-distinct-until-changed`](https://github.com/Andarist/callbag-distinct-until-changed) – Drops consecutive duplicate values. Works on either pullable or listenable sources.

## Contributing

If you have a question or have difficulties using `callbag-keep-sequences`, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, refer to [the issues page](https://github.com/derhuerst/callbag-keep-sequences/issues).