|Perl Monk, Perl Meditation|
Algorithm for cancelling common factors between two lists of multiplicandsby BrowserUk (Patriarch)
|on Aug 08, 2005 at 19:33 UTC||Need Help??|
BrowserUk has asked for the wisdom of the Perl Monks concerning the following question:
Given 2 arrays of numbers, I want an efficient algorithm for "cancelling out". (There is probably a proper name for this, but I don't know it).
Most easily described by example. Given:
I want to cancel values between the arrays to end up with:
Note. This is a trivial example. Both the sizes of the arrays and the values will be much larger.
Update: This is not the elimination of duplicates or intersection of arrays. Once any duplicates have been eliminated, it then becomes a task of reducing factors from @a & @b unil no further factors can be removed.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.