On Wednesday, January 29, 2003, at 04:57 AM, Ron wrote:
I have 2 lists. I need to check whether the values of list 2 fall within theIf those are already sorted as your example is, you can exploit that. (If not, you might consider sorting them or creating them sorted.)
range of the values of list 1. eg.
list 1
1 10
20 25
45 55
list 2
1,3,12,23,34,45,52,78
Here is one way to exploit that: repeat over the items in list two, accumulating those that are in a range in list 2, and then return the accumulation. (Keep up with the current range by line number starting with the first.) To check whether a number is in a range, do two things: First, advance the range line number while the number is not above the upper range limit. (if you run out of ranges, return the accumulation.) Second, if the number is not lower than the lower limit, accumulate it.
Dar Scott
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