Using Bit::Vector you can generate subsets of some set. Using -> increment to increment its value and ->contains to check a particular bit and ->Bit_On and ->Bit_Off to set bits. I think it suits your problem. So in your case if you go over all bitstrings of 5 bits that have just 2 lit, you get what you have in your example.

In reply to Re: Algorithm to convert combinations to bitstring by spx2
in thread Algorithm to convert combinations to bitstring by Limbic~Region

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