it makes no sense. It is wrong.
As to see what makes sense:
scalar(@ra) counts the elements of array @ra.
while ( scalar( @ra ) ) does a while condition around the counting. In this case, you would normally just leave out the counting and write while ( @ra )
Anyway, there needs to be a { } block as to which the while condition belongs. It is missing, that's an error I can't make any sense of.
Sören
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