recently learned about Erik Meijer's latest innovation, Rx, here on Channel 9. Clearly, judging by the views and comments on that post, it piqued your interest and curiosity. Wes Dyer, a rock star developer on Erik's team of rock stars, implemented a great
deal of Rx and helped to design it…
Wes Dyer, Erik Meijer and Jeffrey van Gogh explain a graphical method called "Marble Diagrams" that helps to reason about Rx API.
We use these "Marble Diagrams" to describe how the Rx Select and Where operators behave.