Yamagata must read a computational geometry text, he shall find that 
structures like interval trees provide for such operations. But according to 
which operations you need fast you may have to design your data structure....

Structure monster just got out of a computational geometry project disaster so 
he can't really help in a substantial way (^_^)

All I can say is don't try to make it very functional.

Of course a computational geometry library would be nice :) But it's so hard 
to write decent code in that area.

Cheers,

On Sunday 25 May 2003 13:26, Yamagata Yoriyuki wrote:
> Hi, folks,
>
> I'm looking for the Set/Map like data-structures which can efficiently
> add and remove large intervals over integers, and support
> intersections, unions and compliments.  Does anybody make such
> libraries?  Baire contains interval.ml[i] but misses these
> functionalities.  Is it easy to add them to Baire, or are Baire's
> intervals something different than I thought?
>
> Failing that, is there Set/Map with order-related operations?
> Actually I have one but if there is one actively developed, I would
> like to use it.
>
> By the way, I have a library for arbitrary orders on (finite sets of)
> integers.  I think comparison of two integer is O(log n ^ 2)
> time. (n for the size of the finite set.)  Do you think it is worth to
> make public?
>
> Cheers,
> --
> Yamagata Yoriyuki
>
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