jLinq is a fully extensible Javascript library that allows you to perform LINQ style queries on arrays of object.
In screencast #1 we go over the basics of using jLinq and discuss the different parts of a a jLinq query.
In screencast #2 we go over how to create your first extension method using jLinq and discuss some of the additional features extension methods offer.
In screencast #3 we discuss how you can make changes to your records in the middle of a query to make the rest of the selection process easier.
Screencast #4 goes over some of the changes found in jLinq 2.2.1 (minor update).