Rich Array is a set of functions for working with JavaScript arrays. It contains functions for finding array intersections and differences, array filtering, mapping, getting duplicate-free version of the array and lots of others. Source code is self-documenting and well-commented, so you won't need to read any documentation. It was written with a purpose of getting rid of trivial tasks related to arrays.

http://vladimir-k.blogspot.com/2008/12/rich-array-jquery-plugin.html - homepage of the project.

http://plugins.jquery.com/project/rich-array - Rich Array on jQuery plugin directory