(MEL) problem with reordering uvset script

[absoluteKelvin]

{
   string $mesh[] = `ls -sl`;
   string $uvSets[] = `polyUVSet -q -allUVSets`;
   int $setNum[];
   //int $counter = 0;
   for ($i = 0; $i < size($uvSets); $i++){
       $setNum[$i] = int(`match "[0-9]+$" $uvSets[$i]`); //extract uvSet number
       if ($setNum[$i] != ($i + 1)) // if there is mismatch then run the following
       {
           int $nuvSetNum = $setNum[$i] - 1;
           //print $nuvSetNum;
           polyUVSet -reorder -uvSet $uvSets[$i] -nuv $uvSets[$nuvSetNum]; //swap uvSets
           $uvSet[$i] = $uvSets[$nuvSetNum]; //update the uvSet array
           updateUvSetEditor;
       }
   }
}

this script is making the assumption that the uvSets are name with the same prefix (ie map1 map2 map3...)

what it is suppose to do is reorder the uvSets to numerical order.

example

map2

map3

map5

map1

map4

would become

map1

map2

map3

map4

map5

not sure where it went wrong in the script. any help is welcomed

[mcw0]

Don't know about the rest of the code.  But this is what I saw on initial inspection.

Shouldn't this 

$uvSet[$i] = $uvSets[$nuvSetNum]; //update the uvSet array

be

$uvSets[$i] = $uvSets[$nuvSetNum]; //update the uvSet array

[absoluteKelvin]

great catch mcw0. Now it works some times. but most of the time i run into this error

Error: line 13: Cannot reorder same uv sets. No reorder performed.

[absoluteKelvin]

interestingly after looking at the code in uvTkBuildUVSetsOptions.mel. I was able to get it to work somehow but not the way i want it to. the uvs get sorted after i run the code a few times.

{
   string $mesh[] = `ls -sl`;
   string $uvSets[] = `polyUVSet -q -allUVSets`;
   int $setNum[];
   //int $counter = 0;
   for ($i = 0; $i < size($uvSets); $i++){
       //$setNum[size($setNum)] = int(`match "[0-9]+" $set`)
       $setNum[$i] = int(`match "[0-9]+$" $uvSets[$i]`);
       if ($setNum[$i] != ($i + 1))
       {
           int $destIndex = $i - 1;
           while ($destIndex >= 0)
           {
               polyUVSet -reorder -uvSet $uvSets[$i] -nuv $uvSets[$destIndex];
               $destIndex-- ;
           }
       updateUvSetEditor;    
       //$uvSets = `textScrollList -q -allItems uvSetList`;
       }
   }
}