This is a brute force approach:

I would pack the four small integers as bits in a 32-bit integer instead of using an array. Then the problem reduces to scanning that array and checking each bit against the bitmask.

If you sort the 32-bit integers, you get a quick way of eliminating half of the search space by looking at the highest bit.

In reply to Re: Efficient selection mechanism? by Corion
in thread Efficient selection mechanism? by BrowserUk

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