{"id":26119140,"url":"https://github.com/stdlib-js/blas-ext-base-dsort2ins","last_synced_at":"2026-03-11T17:31:47.606Z","repository":{"id":41362576,"uuid":"376894283","full_name":"stdlib-js/blas-ext-base-dsort2ins","owner":"stdlib-js","description":"Simultaneously sort two double-precision floating-point strided arrays based on the sort order of the first array using insertion sort.","archived":false,"fork":false,"pushed_at":"2025-03-10T01:59:56.000Z","size":655,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-03-27T01:46:38.261Z","etag":null,"topics":["arrange","array","blas","double","extended","float64","float64array","insertion","javascript","math","mathematics","ndarray","node","node-js","nodejs","order","permute","sort","stdlib","strided"],"latest_commit_sha":null,"homepage":"https://github.com/stdlib-js/stdlib","language":"JavaScript","has_issues":false,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/stdlib-js.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG.md","contributing":"CONTRIBUTING.md","funding":null,"license":"LICENSE","code_of_conduct":"CODE_OF_CONDUCT.md","threat_model":null,"audit":null,"citation":"CITATION.cff","codeowners":null,"security":"SECURITY.md","support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null},"funding":{"github":["stdlib-js"],"open_collective":"stdlib","tidelift":"npm/@stdlib/stdlib"}},"created_at":"2021-06-14T16:49:52.000Z","updated_at":"2025-03-10T01:20:41.000Z","dependencies_parsed_at":"2023-12-01T02:45:33.715Z","dependency_job_id":"75fc8609-2d86-4a5d-b703-23fcc3bbdab9","html_url":"https://github.com/stdlib-js/blas-ext-base-dsort2ins","commit_stats":null,"previous_names":[],"tags_count":37,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stdlib-js%2Fblas-ext-base-dsort2ins","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stdlib-js%2Fblas-ext-base-dsort2ins/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stdlib-js%2Fblas-ext-base-dsort2ins/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stdlib-js%2Fblas-ext-base-dsort2ins/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/stdlib-js","download_url":"https://codeload.github.com/stdlib-js/blas-ext-base-dsort2ins/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248270142,"owners_count":21075790,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["arrange","array","blas","double","extended","float64","float64array","insertion","javascript","math","mathematics","ndarray","node","node-js","nodejs","order","permute","sort","stdlib","strided"],"created_at":"2025-03-10T12:15:43.096Z","updated_at":"2026-03-11T17:31:47.600Z","avatar_url":"https://github.com/stdlib-js.png","language":"JavaScript","readme":"\u003c!--\n\n@license Apache-2.0\n\nCopyright (c) 2020 The Stdlib Authors.\n\nLicensed under the Apache License, Version 2.0 (the \"License\");\nyou may not use this file except in compliance with the License.\nYou may obtain a copy of the License at\n\n   http://www.apache.org/licenses/LICENSE-2.0\n\nUnless required by applicable law or agreed to in writing, software\ndistributed under the License is distributed on an \"AS IS\" BASIS,\nWITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\nSee the License for the specific language governing permissions and\nlimitations under the License.\n\n--\u003e\n\n\n\u003cdetails\u003e\n  \u003csummary\u003e\n    About stdlib...\n  \u003c/summary\u003e\n  \u003cp\u003eWe believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.\u003c/p\u003e\n  \u003cp\u003eThe library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.\u003c/p\u003e\n  \u003cp\u003eWhen you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.\u003c/p\u003e\n  \u003cp\u003eTo join us in bringing numerical computing to the web, get started by checking us out on \u003ca href=\"https://github.com/stdlib-js/stdlib\"\u003eGitHub\u003c/a\u003e, and please consider \u003ca href=\"https://opencollective.com/stdlib\"\u003efinancially supporting stdlib\u003c/a\u003e. We greatly appreciate your continued support!\u003c/p\u003e\n\u003c/details\u003e\n\n# dsort2ins\n\n[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] \u003c!-- [![dependencies][dependencies-image]][dependencies-url] --\u003e\n\n\u003e Simultaneously sort two double-precision floating-point strided arrays based on the sort order of the first array using insertion sort.\n\n\u003csection class=\"installation\"\u003e\n\n## Installation\n\n```bash\nnpm install @stdlib/blas-ext-base-dsort2ins\n```\n\nAlternatively,\n\n-   To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]).\n-   If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions).\n-   For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]).\n\nThe [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships.\n\nTo view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.\n\n\u003c/section\u003e\n\n\u003csection class=\"usage\"\u003e\n\n## Usage\n\n```javascript\nvar dsort2ins = require( '@stdlib/blas-ext-base-dsort2ins' );\n```\n\n#### dsort2ins( N, order, x, strideX, y, strideY )\n\nSimultaneously sorts two double-precision floating-point strided arrays based on the sort order of the first array `x` using insertion sort.\n\n```javascript\nvar Float64Array = require( '@stdlib/array-float64' );\n\nvar x = new Float64Array( [ 1.0, -2.0, 3.0, -4.0 ] );\nvar y = new Float64Array( [ 0.0, 1.0, 2.0, 3.0 ] );\n\ndsort2ins( x.length, 1.0, x, 1, y, 1 );\n\nconsole.log( x );\n// =\u003e \u003cFloat64Array\u003e[ -4.0, -2.0, 1.0, 3.0 ]\n\nconsole.log( y );\n// =\u003e \u003cFloat64Array\u003e[ 3.0, 1.0, 0.0, 2.0 ]\n```\n\nThe function has the following parameters:\n\n-   **N**: number of indexed elements.\n-   **order**: sort order. If `order \u003c 0.0`, the input strided array `x` is sorted in **decreasing** order. If `order \u003e 0.0`, the input strided array `x` is sorted in **increasing** order. If `order == 0.0`, the input strided arrays are left unchanged.\n-   **x**: first input [`Float64Array`][@stdlib/array/float64].\n-   **strideX**: `x` index increment.\n-   **y**: second input [`Float64Array`][@stdlib/array/float64].\n-   **strideY**: `y` index increment.\n\nThe `N` and stride parameters determine which elements in the strided arrays are accessed at runtime. For example, to sort every other element\n\n```javascript\nvar Float64Array = require( '@stdlib/array-float64' );\n\nvar x = new Float64Array( [ 1.0, -2.0, 3.0, -4.0 ] );\nvar y = new Float64Array( [ 0.0, 1.0, 2.0, 3.0 ] );\n\ndsort2ins( 2, -1.0, x, 2, y, 2 );\n\nconsole.log( x );\n// =\u003e \u003cFloat64Array\u003e[ 3.0, -2.0, 1.0, -4.0 ]\n\nconsole.log( y );\n// =\u003e \u003cFloat64Array\u003e[ 2.0, 1.0, 0.0, 3.0 ]\n```\n\nNote that indexing is relative to the first index. To introduce an offset, use [`typed array`][mdn-typed-array] views.\n\n```javascript\nvar Float64Array = require( '@stdlib/array-float64' );\n\n// Initial arrays...\nvar x0 = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );\nvar y0 = new Float64Array( [ 0.0, 1.0, 2.0, 3.0 ] );\n\n// Create offset views...\nvar x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element\nvar y1 = new Float64Array( y0.buffer, y0.BYTES_PER_ELEMENT*1 ); // start at 2nd element\n\n// Sort every other element...\ndsort2ins( 2, -1.0, x1, 2, y1, 2 );\n\nconsole.log( x0 );\n// =\u003e \u003cFloat64Array\u003e[ 1.0, 4.0, 3.0, 2.0 ]\n\nconsole.log( y0 );\n// =\u003e \u003cFloat64Array\u003e[ 0.0, 3.0, 2.0, 1.0 ]\n```\n\n#### dsort2ins.ndarray( N, order, x, strideX, offsetX, y, strideY, offsetY )\n\nSimultaneously sorts two double-precision floating-point strided arrays based on the sort order of the first array `x` using insertion sort and alternative indexing semantics.\n\n```javascript\nvar Float64Array = require( '@stdlib/array-float64' );\n\nvar x = new Float64Array( [ 1.0, -2.0, 3.0, -4.0 ] );\nvar y = new Float64Array( [ 0.0, 1.0, 2.0, 3.0 ] );\n\ndsort2ins.ndarray( x.length, 1.0, x, 1, 0, y, 1, 0 );\n\nconsole.log( x );\n// =\u003e \u003cFloat64Array\u003e[ -4.0, -2.0, 1.0, 3.0 ]\n\nconsole.log( y );\n// =\u003e \u003cFloat64Array\u003e[ 3.0, 1.0, 0.0, 2.0 ]\n```\n\nThe function has the following additional parameters:\n\n-   **offsetX**: `x` starting index.\n-   **offsetY**: `y` starting index.\n\nWhile [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the offset parameter supports indexing semantics based on a starting index. For example, to access only the last three elements of `x`\n\n```javascript\nvar Float64Array = require( '@stdlib/array-float64' );\n\nvar x = new Float64Array( [ 1.0, -2.0, 3.0, -4.0, 5.0, -6.0 ] );\nvar y = new Float64Array( [ 0.0, 1.0, 2.0, 3.0, 4.0, 5.0 ] );\n\ndsort2ins.ndarray( 3, 1.0, x, 1, x.length-3, y, 1, y.length-3 );\n\nconsole.log( x );\n// =\u003e \u003cFloat64Array\u003e[ 1.0, -2.0, 3.0, -6.0, -4.0, 5.0 ]\n\nconsole.log( y );\n// =\u003e \u003cFloat64Array\u003e[ 0.0, 1.0, 2.0, 5.0, 3.0, 4.0 ]\n```\n\n\u003c/section\u003e\n\n\u003c!-- /.usage --\u003e\n\n\u003csection class=\"notes\"\u003e\n\n## Notes\n\n-   If `N \u003c= 0` or `order == 0.0`, both functions leave `x` and `y` unchanged.\n-   The algorithm distinguishes between `-0` and `+0`. When sorted in increasing order, `-0` is sorted before `+0`. When sorted in decreasing order, `-0` is sorted after `+0`.\n-   The algorithm sorts `NaN` values to the end. When sorted in increasing order, `NaN` values are sorted last. When sorted in decreasing order, `NaN` values are sorted first.\n-   The algorithm has space complexity `O(1)` and worst case time complexity `O(N^2)`.\n-   The algorithm is efficient for **small** strided arrays (typically `N \u003c= 20`) and is particularly efficient for sorting strided arrays which are already substantially sorted.\n-   The algorithm is **stable**, meaning that the algorithm does **not** change the order of strided array elements which are equal or equivalent (e.g., `NaN` values).\n-   The input strided arrays are sorted **in-place** (i.e., the input strided arrays are **mutated**).\n\n\u003c/section\u003e\n\n\u003c!-- /.notes --\u003e\n\n\u003csection class=\"examples\"\u003e\n\n## Examples\n\n\u003c!-- eslint no-undef: \"error\" --\u003e\n\n```javascript\nvar round = require( '@stdlib/math-base-special-round' );\nvar randu = require( '@stdlib/random-base-randu' );\nvar Float64Array = require( '@stdlib/array-float64' );\nvar dsort2ins = require( '@stdlib/blas-ext-base-dsort2ins' );\n\nvar rand;\nvar sign;\nvar i;\n\nvar x = new Float64Array( 10 );\nvar y = new Float64Array( 10 ); // index array\nfor ( i = 0; i \u003c x.length; i++ ) {\n    rand = round( randu()*100.0 );\n    sign = randu();\n    if ( sign \u003c 0.5 ) {\n        sign = -1.0;\n    } else {\n        sign = 1.0;\n    }\n    x[ i ] = sign * rand;\n    y[ i ] = i;\n}\nconsole.log( x );\nconsole.log( y );\n\ndsort2ins( x.length, -1.0, x, -1, y, -1 );\nconsole.log( x );\nconsole.log( y );\n```\n\n\u003c/section\u003e\n\n\u003c!-- /.examples --\u003e\n\n\u003c!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. --\u003e\n\n\u003csection class=\"related\"\u003e\n\n* * *\n\n## See Also\n\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/blas-ext/base/dsortins`][@stdlib/blas/ext/base/dsortins]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003esort a double-precision floating-point strided array using insertion sort.\u003c/span\u003e\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/blas-ext/base/gsort2ins`][@stdlib/blas/ext/base/gsort2ins]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003esimultaneously sort two strided arrays based on the sort order of the first array using insertion sort.\u003c/span\u003e\n-   \u003cspan class=\"package-name\"\u003e[`@stdlib/blas-ext/base/ssort2ins`][@stdlib/blas/ext/base/ssort2ins]\u003c/span\u003e\u003cspan class=\"delimiter\"\u003e: \u003c/span\u003e\u003cspan class=\"description\"\u003esimultaneously sort two single-precision floating-point strided arrays based on the sort order of the first array using insertion sort.\u003c/span\u003e\n\n\u003c/section\u003e\n\n\u003c!-- /.related --\u003e\n\n\u003c!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --\u003e\n\n\n\u003csection class=\"main-repo\" \u003e\n\n* * *\n\n## Notice\n\nThis package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.\n\nFor more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].\n\n#### Community\n\n[![Chat][chat-image]][chat-url]\n\n---\n\n## License\n\nSee [LICENSE][stdlib-license].\n\n\n## Copyright\n\nCopyright \u0026copy; 2016-2026. The Stdlib [Authors][stdlib-authors].\n\n\u003c/section\u003e\n\n\u003c!-- /.stdlib --\u003e\n\n\u003c!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --\u003e\n\n\u003csection class=\"links\"\u003e\n\n[npm-image]: http://img.shields.io/npm/v/@stdlib/blas-ext-base-dsort2ins.svg\n[npm-url]: https://npmjs.org/package/@stdlib/blas-ext-base-dsort2ins\n\n[test-image]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/actions/workflows/test.yml/badge.svg?branch=main\n[test-url]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/actions/workflows/test.yml?query=branch:main\n\n[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/blas-ext-base-dsort2ins/main.svg\n[coverage-url]: https://codecov.io/github/stdlib-js/blas-ext-base-dsort2ins?branch=main\n\n\u003c!--\n\n[dependencies-image]: https://img.shields.io/david/stdlib-js/blas-ext-base-dsort2ins.svg\n[dependencies-url]: https://david-dm.org/stdlib-js/blas-ext-base-dsort2ins/main\n\n--\u003e\n\n[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg\n[chat-url]: https://stdlib.zulipchat.com\n\n[stdlib]: https://github.com/stdlib-js/stdlib\n\n[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors\n\n[umd]: https://github.com/umdjs/umd\n[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules\n\n[deno-url]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/tree/deno\n[deno-readme]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/blob/deno/README.md\n[umd-url]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/tree/umd\n[umd-readme]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/blob/umd/README.md\n[esm-url]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/tree/esm\n[esm-readme]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/blob/esm/README.md\n[branches-url]: https://github.com/stdlib-js/blas-ext-base-dsort2ins/blob/main/branches.md\n\n[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/blas-ext-base-dsort2ins/main/LICENSE\n\n[@stdlib/array/float64]: https://github.com/stdlib-js/array-float64\n\n[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray\n\n\u003c!-- \u003crelated-links\u003e --\u003e\n\n[@stdlib/blas/ext/base/dsortins]: https://github.com/stdlib-js/blas-ext-base-dsortins\n\n[@stdlib/blas/ext/base/gsort2ins]: https://github.com/stdlib-js/blas-ext-base-gsort2ins\n\n[@stdlib/blas/ext/base/ssort2ins]: https://github.com/stdlib-js/blas-ext-base-ssort2ins\n\n\u003c!-- \u003c/related-links\u003e --\u003e\n\n\u003c/section\u003e\n\n\u003c!-- /.links --\u003e\n","funding_links":["https://github.com/sponsors/stdlib-js","https://opencollective.com/stdlib","https://tidelift.com/funding/github/npm/@stdlib/stdlib"],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstdlib-js%2Fblas-ext-base-dsort2ins","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fstdlib-js%2Fblas-ext-base-dsort2ins","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstdlib-js%2Fblas-ext-base-dsort2ins/lists"}