Albatross: interval sets in Scala

[Dominic Fox]

I've written a small Scala library for doing things with interval sets - that is, sets that are defined in terms of the ranges of values they enclose, e.g.

closed(0) to closed(5)                  // [1...5]

closed(today) to open(nextFriday) // today to next Friday, not inclusive

unbounded[Double] to open(0.0)   // all non-zero negative Doubles

The functionality is similar to that of Guava's Ranges, except that non-continuous intervals are also supported, e.g.

(closed(0) to closed(5)) union (closed(10) to closed(15)) // [1...5] U [10...15]

(closed(0) to closed(15)) complement (open(5) to open(10)) // [1...5] U [10...15]

The code, plus further examples, is on github here: https://github.com/youdevise/albatross

Dominic

[Tom Switzer]

Awesome! I saw you deal with discrete types specially -- any chance of having a separate discrete interval set that actually extends Set/Iterable? Also, any chance of supporting a more general Map? You'd need to return Lists of values from the map though, rather than an Option.

Dominic

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