ordered-freq-counter

Ordered frequency counter with top-N queries, built on btree-core.

Install

npm install ordered-freq-counter

Usage

const OrderedFreqCounter = require('ordered-freq-counter');

const counter = new OrderedFreqCounter();

counter.add('apple');
counter.add('banana');
counter.add('apple');
counter.add('carrot', 3);

counter.get('apple'); // 2

counter.top(2);
// [
//   { key: 'carrot', count: 3 },
//   { key: 'apple', count: 2 }
// ]

counter.entriesByKey();
// apple, banana, carrot (sorted by key)

API

| Method | Description | | --- | --- | | add(key, delta?) | Increase count (default +1) | | get(key) | Current count (0 if missing) | | has(key) | Whether key exists | | delete(key) | Remove key | | top(limit?) | Highest counts first (default 10) | | entriesByKey() | Entries sorted by key | | clear() | Reset | | size | Distinct keys |

License

MIT