in reply to Re^3: Bidirectional lookup algorithm? (sundialsvc4 spam)
in thread Bidirectional lookup algorithm? (Updated: further info.)

generate a synthetic key, within the same domain of values, for each key that you wish to store.

Care to elaborate?

Perhaps you can post an example of how to generate a synthetic key for pairs selected from the domains: 'aaaaaaaa' .. 'zzzzzzzz'; and 0 .. 2^64-1?

Each bucket in this hashref points to an arrayref of references.

If the keys are synthesized, why do the values need to be arrays? And why "arrays of references"?

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