/random-shufflePublic
BranchesTags

Repository files navigation

About stdlib...

We 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.

The 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.

When 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.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

Shuffle

NPM versionBuild StatusCoverage Status

Shuffle elements of an array-like object.

Installation

npm install @stdlib/random-shuffle

Alternatively,

  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To 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.

Usage

varshuffle=require('@stdlib/random-shuffle');

shuffle( arr[, options] )

Shuffles elements of an array-like object.

vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]

The function accepts the following options:

  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.

By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.

vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true

To return a deep copy, set the copy option to deep.

varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true

shuffle.factory( [options] )

Returns a function to shuffle elements of array-like objects.

varmyshuffle=shuffle.factory();

The function accepts the following options:

  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.

To seed the underlying pseudorandom number generator, set the seed option.

varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]

By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.

varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false

Examples

varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}

See Also

Notice

This package is part of 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.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

Chat

License

See LICENSE.

Copyright

Copyright © 2016-2026. The Stdlib Authors.

About

Shuffle elements of an array-like object.

github.com/stdlib-js/stdlib

Topics

arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates

Resources

Readme
Apache-2.0 license

Code of conduct

Code of conduct

Contributing

Contributing

Security policy

Security policy
Activity
Custom properties

Stars

2 stars

Watchers

2 watching

Forks

0 forks
Report repository

Releases

Sponsor this project

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
/random-shufflePublic
BranchesTags
Repository files navigation

About stdlib...

We 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.
The 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.
When 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.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Shuffle
NPM versionBuild StatusCoverage Status
Shuffle elements of an array-like object.
Installation
npm install @stdlib/random-shuffle
Alternatively,
  • To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
  • If you are using Deno, visit the deno branch (see README for usage intructions).
  • For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).
The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To 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.
Usage
varshuffle=require('@stdlib/random-shuffle');
shuffle( arr[, options] )
Shuffles elements of an array-like object.
vararr=[1,2,3];varout=shuffle(arr);// e.g., returns [ 3, 1, 2 ]
The function accepts the following options:
  • copy: string indicating whether to return a copy (deep,shallow or none). Default: shallow.
By default, the function returns a shallow copy. To mutate the input array (e.g., when input values can be discarded or when optimizing memory usage), set copy to none.
vararr=[1,2,3];varout=shuffle(arr,{'copy': 'none'});varbool=(arr===out);// returns true
To return a deep copy, set the copy option to deep.
varobj={'beep': 'boop'};vararr=[[obj],[obj],[obj]];// Deep copy:varout=shuffle(arr,{'copy': 'deep'});varbool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns false// Shallow copy:out=shuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns falsebool=(arr[2]===out[2]);// returns true
shuffle.factory( [options] )
Returns a function to shuffle elements of array-like objects.
varmyshuffle=shuffle.factory();
The function accepts the following options:
  • copy: string specifying the default copy option (deep,shallow or none). Default: shallow.
  • seed: pseudorandom number generator seed.
To seed the underlying pseudorandom number generator, set the seed option.
varmyshuffle=shuffle.factory({'seed': 239});varout=myshuffle([0,1,2,3,4]);// e.g., returns [ 3, 4, 1, 0, 2 ]
By default, the returned functions create shallow copies when shuffling. To override the default copy strategy, set the copy option.
varmyshuffle=shuffle.factory({'copy': 'none','seed': 867});// Created shuffle function mutates input array by default:vararr=[1,2,3,4,5,6];varout=myshuffle(arr);varbool=(arr===out);// returns true// Default option can be overridden:arr=[1,2,3,4];out=myshuffle(arr,{'copy': 'shallow'});bool=(arr===out);// returns false
Examples
varshuffle=require('@stdlib/random-shuffle');varresult;vardata;vari;data=newArray(20);for(i=0;i<data.length;i++){data[i]=i;}for(i=0;i<10;i++){result=shuffle(data);console.log(result);}
See Also
Notice
This package is part of 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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
Chat
License
See LICENSE.
Copyright
Copyright © 2016-2026. The Stdlib Authors.
About
Shuffle elements of an array-like object.
github.com/stdlib-js/stdlib
Topics
arraycombinatoricsfisherjavascriptknuthmathmathematicsnodenode-jsnodejspermpermutationrandrandomrandpermshufflestdlibyates
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Custom properties
Stars
2 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Sponsor this project
Packages
Used by
Contributors
Languages