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Re:Array.js: A better array for the browser and Node.js by goatslacker on Friday February 15, 2013 @06:50PM (#5229525)
It's a nice little library but it looks like the meat of it is in Enumerable which is pretty nice but it's really slow when working with larger arrays.

If you don't need the events then lo_dash/underscore is probably the better tool.

Re:Array.js: A better array for the browser and Node.js by camus on Friday February 15, 2013 @10:39PM (#5230271)
... and you dont want something fired everytime you map().filter().reject().map().filter().some()... which might lead to nothing but bad performances ,especially on huge collections.