In a key-value store like Redis, it's actually quite useful to be able to generate an atomic query that says something like "If List A contains B, return C. Otherwise check whether List D contains E, and if so, return all the keys and values of Dictionary F, but otherwise return zero."

But of course, Redis already has Lua scripting which is a nearly perfect fit for its use case. JavaScript looks terribly cluttered by comparison. Some sort of V8 integration might make sense if the goal is to make Redis even easier to use with node.js, but I don't see anything in the documentation to suggest that this is what's happening.