You could handle (some) larger combinatorials (and speed up the code) by
modifying like so:
function __factorialFloor x,f
if x <= f then return 1
return x * __factorialFloor(x-1,f)
end __factorialFloor
function __nCombFloor n, r
if (r > 0) or (r <= n) then \
return __factorialFloor(n,max(r,n-r))/__factorial(min(r,n-r))
Answer "nComb error:" && r && "is not between 0 and" && n
exit to top
end __nCombFloor
Of course, to handle even more/larger possible values you could decompose
the arguments to their prime factors and eliminate dupes rather than
divide, but this was a fairly easy optimization.
On Sun, Feb 1, 2015 at 12:02 PM, Michael Doub <miked...@gmail.com> wrote:
> Release 24
> * added:
> __Zap - a function that returns only POSIX printable characters,
> space, tab and return from a
> string
> __GetRegexMatches - Finds all the matches of pregex in ptext and
> returns a list of the
> start,end char positions
> __deleteExtraTokens - This fuction witll remove sequences of the
> specified token that are greater than
> one.
> __combinatorial - returns all possible subsets of a set, where n = #
> of objects in the set
> __nComb - Returns the # of combinations of n objects taken r at a time
> __factorial - Returns x!
> __latLongDist - Finds distances between two points based on Latitude
> and Longitude
> __dd2dms - Converts a digital longitude or Latitude into degrees,
> minutes, seconds, direction format.
> __dms2dd - Converts a degrees, minutes, seconds, direction longitude or
> latitude to digital format
>
> https://www.dropbox.com/s/3wpwn3hfbmpl7sk/MasterLibrary.livecode?dl=0
>
> Enjoy...
>
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