Ernie Oporto - 2003-10-08

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Right now the feed sorting is really just the alphabetical
listing of feed titles. To do this prev/next function easily, we
would need to add an order column to the px_feeds table in
order to know the current value in the feed sort. Then it
would be an easy matter of setting one link to the left to be
previous feed (current_value - 1, as long as it is 0 or greater)
and a link to the right to be next feed (current_value + 1, as
long as it is less than max_value).

This would also allow you to alter the sorting of your feeds
rather than just viewing alphabetically, i.e., move the ones
you are most interested in reading to the top.