Persistent Variables during recursion

[John Craig]

Hi, Bob.  Here's one way of doing it.  In the first call, pIndex is 
empty, so some initialization is performed.  The parameters are all 
passed with each recursive call, but pSame is always the same value.

HTH


:)



on mouseUp
    test "12345", 1, 99
end mouseUp


command test pData, pChange, pSame, pIndex
    if pIndex is not an integer then
       put 1 into tpIndex
       put "first time" & LF into msg
    end if

    put char pIndex of pData after pData
    put pIndex ^ 2 into pChange
    add 1 to pIndex

    put pData & ", " & pChange & ", " & pSame & ", " & pIndex & LF after msg

    if length(pData) < 10 then
       test pData, pChange, pSame, pIndex
    end if
end test


On 26/01/2012 20:04, Bob Sneidar wrote:
> Hi all. This is my first foray into recursive functions. There are two variables I would like to be persistent for as long as the script is running, but I want them to be empty the first time I call the recursive function. I have tried declaring the variables as local, but each time the function calls itself, the variables are wiped as though a new set is made. If I declare them as global, then of course the value persists even after the last recursion terminates. The function has no idea if it is  the first time through or one of the iterations. Any idea how to get around this?
>
> Bob
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