My work involves a lot of time series analysis, as such I'm often dealing with intervals. While the overlap algorithm (or rather "condition") is cute, there a

My work involves a lot of time series analysis, as such I'm often dealing with intervals. While the overlap algorithm (or rather "condition") is cute, there a lot more "cool" stuff to do with intervals, which I would have liked to see in there. - Checking whether multiple intervals overlap - Checking whether multiple intervals are contiguous - Merging contiguous intervals - Etc.. From experience, something is also crucial when working with intervals: trivially knowing which boundaries are closed and which are opened. I found that defining a strict vocabulary helps a lot here. e.g. "last" is "inclusive", while "end" is exclusive. [closed; opened[ intervals are also the best when dealing with time intervals (if that makes sense in your use case), because you can trivially join them.