Implement Array Shuffling in MooTools
While shuffling the order of array elements isn't a greatly useful function, I recently found myself needing to accomplish the task. I found a great post about how to achieve this feat using jQuery. Here's how to implement array shuffling in MooTools.
The MooTools JavaScript
Array.implement({
shuffle: function() {
//destination array
for(var j, x, i = this.length; i; j = parseInt(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
return this;
}
});
This likely wont be used in the core framework but does have its uses.
![Being a Dev Dad]()
I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...
![How I Stopped WordPress Comment Spam]()
I love almost every part of being a tech blogger: learning, preaching, bantering, researching. The one part about blogging that I absolutely loathe: dealing with SPAM comments. For the past two years, my blog has registered 8,000+ SPAM comments per day. PER DAY. Bloating my database...
![RealTime Stock Quotes with MooTools Request.Stocks and YQL]()
It goes without saying but MooTools' inheritance pattern allows for creation of small, simple classes that possess immense power. One example of that power is a class that inherits from Request, Request.JSON, and Request.JSONP: Request.Stocks. Created by Enrique Erne, this great MooTools class acts as...
![Create WordPress Page Templates with Custom Queries]()
One of my main goals with the redesign was to make it easier for visitors to find the information that was most popular on my site. Not to my surprise, posts about MooTools, jQuery, and CSS were at the top of the list. What...
Another way (more elegant in my opinion):
Array.implement({ shuffle:function() { this.sort(function (x,y) { return Math.floor(Math.random()*3)-1; }); return this; } }); alert([1,2,3,4,5,6,7,8].shuffle());@Elad: Awesome! Nice work. Definitely more elegant.
Just a note that you can do cool stuff like this with Array Shuffling. :)
@Lim Chee Aun: Awesome!
I’ll point out that @David’s example is guaranteed to not require any additional storage space (it shuffles in place), is unbiased toward permutations, and runs in O(n) time. @Elad’s shuffle depends on the browser’s implementation of sort(). It may require more storage space, it may be biased to certain permutations, and it will run in O(n log n) time or worse due to the nature of sorting. However, I’m guessing that anything shuffled in JS is going to be small and no one will care if it is biased as long as it “seems” random.
I’ve tested both Elad and David script on a 27 lenght array… the shuffling is far better using David’s one….
Anyone for the best of both world : efficiency and elegance ?
Anyway thank you so much for the tip !
I’m trying to learn mootools (both in a general sense, and all over again with 1.2), and javascript OOP at the same time. How I use this to shuffle the order of some list elements on a webpage?
And, if you don’t mind, how would I do this in 1.1 vs. 1.2?
Hehe although the original idea is older than my mom (probably no one here knows the creator of this…), I would be glad if people could copy my things keeping the credits ^^
http://jsfromhell.com/array/shuffle