> I'm curious why the order in which the hash is traversed would matter at all.

It doesn't for this special algorithm, like already explained here

But if you want the inverse - however "inversion" is defined - you need to build a new hash with accordingly "inverted" weights, like demonstrated here.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^6: Randomly choosing from a set of alternatives with varying popularity by LanX
in thread Randomly choosing from a set of alternatives with varying popularity by ibm1620

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