This week Adam started looking at Arrowized FRP by reading The Yampa Arcade by Courtney, Nilsson and Peterson. Initial efforts to apply the framework by implementing a simple bouncing ball simulation proved to be a challenge. Specifically, an attempt at representing the speed and position of the ball as individual signal functions (arrows mapping signals to signals) was unsuccessful. Adam suspects a mutually recursive relation between speed and position led to an infinite loop upon execution. Judging by the patterns presented in The Yampa Arcade, a better approach is to represent the entire state of the simulation as a data type, making this the input and output of a single signal function.
During the coming week, Adam plans to read Functional Reactive Programming, Continued by Courtney, Nilsson and Peterson, in order to get a broader view of the signal function switching combinators provided by Yampa.
