This is a project to be done for one of the Houston Clojure group meetings.
Build a function calculate that parses and evaluates a string.
Keeping track of the input string and the operator stack might be just stateful enough to be problematic.
Some ideas:
- Write a java library to solve the problem and bind it to clojure
- Write a parser to translate the input into clojure and eval it
- Inject an infix macro around the input and eval it
- Use mutable state in clojure (var/ref/atom/agent)
- Track state as function params
- Applicative Functors/Monads for parsing and state management
A basic structure and test file is provided. It can be run using lein test. I assume cake should work similarly.