How To Read Arrow Key

[Calder-Ty]

Keyboard event handling is a fun area. If you are fully intent on learning how that works, then I recommend reading through code that has done it, to understand what is needed.

This post contains some resources for learning:

Io - polling for key down event - how to?

To answer your question, There will be two parts to what you are trying to do[1] First: since you are reading from a tty, you will need to put the tty in ‘non-canonical’ mode. By default TTY’s will only write out data on a new line. You can change that to stream data on new bytes, by putting the tty into non-canonical mode. man termios has more information on what that means. Second: There is a std.io.poll function, which will give you a poller on a file. Here are some additional resources an…