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knuth-shuffle.js
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Merge branch 'master' of github.com:coolaj86/knuth-shuffle

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AJ ONeal 2013-12-03 13:20:45 -07:00
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@ -3,14 +3,22 @@ knuth-shuffle
The Fisher-Yates (aka Knuth) shuffle for Browser and Node.js
* [Mike Bostock's Fisher–Yates Shuffle Visualization](http://bost.ocks.org/mike/shuffle/)
* [How to randomize/shuffle a JavaScript array](http://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array)
* [Fisher-Yates Shuffle on Wikipedia](http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle)
* [Doing the Microsoft Shuffle: Algorithm Fail in Browser Ballot](http://www.robweir.com/blog/2010/02/microsoft-random-browser-ballot.html)
* [knuth-shuffle on NPM](https://npmjs.org/package/knuth-shuffle)
'nuf said.
The Fisher-Yates (Knuth) Shuffle
===
As Microsoft learned the hard way (see article below), `function random() { return 0.5 - Math.random() }` turns out to be no-so-random at all.
The fisher-yates shuffle is an algorithm so simple that not even
The fisher-yates shuffle is an algorithm so simple that even
[IEEE floating point math](http://blogs.adobe.com/bparadie/2011/11/22/0-2-0-1-0-30000000000000004/)
can screw it up!
can't screw it up!
I put this on npm as `knuth-shuffle` because `fisher-yates-shuffle`
was just too long of a name and shuffle was already taken.
@ -19,7 +27,7 @@ Browser Example
===
```html
<script src="./knuth-shuffle.js"></script>
<script src="https://raw.github.com/coolaj86/knuth-shuffle/master/index.js"></script>
```
```javascript
@ -59,12 +67,3 @@ npm install -S knuth-shuffle
console.log(b);
}());
```
See Also
===
* [Mike Bostock's Fisher–Yates Shuffle Visualization](http://bost.ocks.org/mike/shuffle/)
* [How to randomize/shuffle a JavaScript array](http://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array)
* [Fisher-Yates Shuffle on Wikipedia](http://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle)
* [Doing the Microsoft Shuffle: Algorithm Fail in Browser Ballot](http://www.robweir.com/blog/2010/02/microsoft-random-browser-ballot.html)
* [knuth-shuffle on NPM](https://npmjs.org/package/citare-scriptum)