RE: getn

[Reuben Thomas <rrt@...>]

>     function tsize(t)
>         local c = 0
>         for k,v in t do c=c+1 end
>         return c
>     end

...which is a generalisation of the neat little trick to find if a table
is empty:

function empty(t)
  for _, _ in t do
    return nil
  end
  return 1
end

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