# ranges-merge > Merge and sort string index ranges
## 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