space-efficient top-N algorithm

[Christos TZOTZIOY Georgiou]

On Sun, 09 Feb 2003 14:35:31 GMT, rumours say that Alex Martelli
<aleax at aleax.it> might have written:

[David wants to count item occurences, while I hastily understood "item
AND count" records]

>Either I misread David's problem, or you did.

I did.  Mea culpa :(
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