Counting and numbering duplicates in a list
Peter M. Brigham, MD
pmbrig at gmail.com
Wed Sep 28 23:41:19 EDT 2011
function flagDupes tList
put tList into scratchList
repeat for each line t in tList
if t is among the lines of scratchList or \
freqArray[t] > 0 then
add 1 to freqArray[t]
put cr & t & "-" & freqArray[t] after outputList
else
put cr & t after outputList
end if
delete line 1 of scratchList
end repeat
delete char 1 of outputList
return outputList
end flagDupes
I *think* this should be fast with large lists.
-- Peter
Peter M. Brigham
pmbrig at gmail.com
http://home.comcast.net/~pmbrig
On Sep 28, 2011, at 10:52 PM, Roger Eller wrote:
> There are several ways I could approach this, but I'm unsure which way is
> best? I have a list of numbers that 'may' contain duplicates. I need to
> sequence ONLY the duplicates without changing the order the list. If there
> is only one, it does not need to be sequenced.
>
> Should I just repeat, and keep the content of line x in a variable, then add
> 1 to a sequence variable if the number is encountered again? Is there a
> better way? Simple stuff, I know, but these lists can be really long, and I
> want it to process as quickly possible.
>
> 12345
> 12345
> 12344
> 12333
> 10112
> 12333
>
> must become:
>
> 12345-1
> 12345-2
> 12344
> 12333-1
> 10112
> 12333-2
>
> ˜Roger
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