Underscore.js is a good Javascript library with many helper methods to work with Collections, Arrays and objects.
JSUtil2 is a port of Underscore.js’s methods to Server Side. There is already a Script Include called JSUtil which is a JavaScript helper Script Include. JSUtil2 adds some more methods to it.
JSUtil2 is on Github, both docs and the script. Have fun! Let me know what you think in the comments. Here is the gist :