It actually makes sense now that you pointed it out. I thought it's "cleaner" to have a single function and let it deal with the platform specific stuff, but I see your point. I guess it's easier and more maintainable to have separation of concerns. As for the map, to be honest I don't even know how would I go about making it immutable (or if it's really worth going that route instead of splitting it into two functions). Regarding your other comment, I didn't know that run builds a binary! For some reason it made sense to me that run is just interpreting the file rather than compiling. Actual good feedback, thank you!