Sorry to reply to my own post, but I just looked carefully at Ondrej's solution,
and the nice thing about it is that it doesn't matter what order the columns are
in, it will always sort on the header. So his program is a lot more generic than
mine. Nice!
    Pete

Pete Emerson wrote:

> Here's my version. It's pretty straightforward, but maybe Ondrej's solution is
> far better for some reason?

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