In principle, I might just as easily have used a simple array or rooms indexed from 0 to 9 (say) to represent a map of ten rooms). Each ‘exit' could then have been an integer - so if the North exit were 1 that would mean it leads into the room at index 1 in the array. Using string keys instead of integers made the map a bit more easily readable but, essentially, moving from one location to another still required me to obtain a value (e.g. the string at exit N) and then use that value (...)
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