function for greatest object in list less than or equal to a value

[Peter TB Brett]

On 12/10/2015 03:26, Peter M. Brigham wrote:
> function getMaxLessThan tList,maxVal
>     repeat for each item i in tList
>        if i < maxVal then put i & comma after outList
>     end repeat
>     return max(item 1 to -1 of outList)
> end getMaxLessThan

This should be slightly faster, because it only loops over the items once:

     function getMaxLessThan pList, pLimit
        local tMaxFound, tItem
        put empty into tMaxFound
        repeat for each item tItem in tList
           if tItem < pLimit and \
                 (tItem > tMaxFound or tMaxFound is empty) then
              put tItem into tMaxFound
           end if
        end repeat
        return tMaxFound
     end getMaxLessThan

The "sort"-based solution will be much less efficient for long input 
lists because sorting is O(N*log(N)), whereas Peter Brigham's and my 
solutions are O(N).

                                      Peter

-- 
Dr Peter Brett <peter.brett at livecode.com>
LiveCode Open Source Team

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