listcrunch

A JS port of MuckRock/listcrunch

A simple human-readable way to compress redundant sequential data.

Usage

Compressing

import { crunch } from 'listcrunch';

crunch([ 1, 1, 1, 1, 1, 1, 1, 1, 1, 2 ])
// => '1:0-8;2:9', meaning 1 appears in indices 0-8 (inclusive) and 2 occurs at index 9.

Uncompressing

import { uncrunch } from 'listcrunch';

uncrunch('50:0-1,3-4;3:2,5;60:6;70:7-8');
// => [ '50', '50', '3', '50', '50', '3', '60', '70', '70' ]

Note: the returned data is always an array of strings, even if the original array contained other item types