I don't need you to be able to deduce what the J is doing. What I need is to write the computation as fast as possible so I can get the answer I need to know an

I don't need you to be able to deduce what the J is doing. What I need is to write the computation as fast as possible so I can get the answer I need to know and then get back to whatever else I was doing. If I was writing something I needed to share with someone else, for sure I wouldn't use J!