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Re: knapsack problem solved by regex

by jwkrahn (Monsignor)
on Mar 15, 2010 at 18:19 UTC ( #828763=note: print w/replies, xml ) Need Help??


in reply to knapsack problem solved by regex

On a hunch I changed:

for ( keys %items ) {

To:

for ( sort { $items{ $b }{ v } <=> $items{ $a }{ v } } keys %items ) {

Which produced a nice speed-up compared to the default hash order.

Note that the converse of:

for ( sort { $items{ $a }{ v } <=> $items{ $b }{ v } } keys %items ) {

Was a lot slower than the default hash order.

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