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I assumed that the set would vary (although using eval to convert the arrayref returned from parse into a closure like your tst could be interesting even if compile could end up longer than parse) and tried to optimize for the "many points" and "many ranges" cases; thus all those extra passes in the parse sub to simplify the result. I excluded floating point because exact comparisons are not reliable and it is easier to restrict the domain to integers. Multiple dimensions start to get complex enough that I suspect a general optimal solution is impossible — optimizing that case will depend on the actual data used.

The "suggesting but not providing an example" remark was an excuse for posting my solution — usually these questions have been "done to death" before I get to them. ;-)


In reply to Re^3: Comparing a value to a list of numbers by jcb
in thread Comparing a value to a list of numbers by g_speran

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