Reading

I found, that third code listing telling

You can see this effect by changing the return statement to:

return element {$income} {count($ppl)}

is exactly the same return statement as in first code listing and shall be probably changed into

return element {$income} {$ppl}

I tried to tell that directly on wiki, but I got no permission to do that, so I use this mailing list for it.

Jan

PS: I did not test the sample, I only know, it shall differ from the first one and this is my estimation.