# ranges-merge > Merge and sort string index ranges <div class="package-badges"> <a href="https://www.npmjs.com/package/ranges-merge" rel="nofollow noreferrer noopener"> <img src="https://img.shields.io/badge/-npm-blue?style=flat-square" alt="page on npm"> </a> <a href="https://codsen.com/os/ranges-merge" rel="nofollow noreferrer noopener"> <img src="https://img.shields.io/badge/-codsen-blue?style=flat-square" alt="page on codsen.com"> </a> <a href="https://github.com/codsen/codsen/tree/main/packages/ranges-merge" rel="nofollow noreferrer noopener"> <img src="https://img.shields.io/badge/-github-blue?style=flat-square" alt="page on github"> </a> <a href="https://npmcharts.com/compare/ranges-merge?interval=30" rel="nofollow noreferrer noopener" target="_blank"> <img src="https://img.shields.io/npm/dm/ranges-merge.svg?style=flat-square" alt="Downloads per month"> </a> <a href="https://prettier.io" rel="nofollow noreferrer noopener" target="_blank"> <img src="https://img.shields.io/badge/code_style-prettier-brightgreen.svg?style=flat-square" alt="Code style: prettier"> </a> <img src="https://img.shields.io/badge/licence-MIT-brightgreen.svg?style=flat-square" alt="MIT License"> <a href="https://liberamanifesto.com" rel="nofollow noreferrer noopener" target="_blank"> <img src="https://img.shields.io/badge/libera-manifesto-lightgrey.svg?style=flat-square" alt="libera manifesto"> </a> </div> ## Install ```bash npm i ranges-merge ``` ## Quick Take ```js import { strict as assert } from "assert"; import { rMerge } from "ranges-merge"; // joining edges: assert.deepEqual( rMerge([ [1, 2], [2, 3], [9, 10], ]), [ [1, 3], [9, 10], ] ); // an overlap: assert.deepEqual( rMerge([ [1, 5], [2, 10], ]), [[1, 10]] ); ``` ## Documentation Please [visit codsen.com](https://codsen.com/os/ranges-merge/) for a full description of the API and examples. ## Contributing To report bugs or request features or assistance, [raise an issue](https://github.com/codsen/codsen/issues/new/choose) on GitHub. ## Licence MIT License Copyright (c) 2010-2021 Roy Revelt and other contributors <img src="https://codsen.com/images/png-codsen-ok.png" width="98" alt="ok" align="center"> <img src="https://codsen.com/images/png-codsen-1.png" width="148" alt="codsen" align="center"> <img src="https://codsen.com/images/png-codsen-star-small.png" width="32" alt="star" align="center">