This doesn't get you a byte array, but here's how I'd get a binary
representation of a number using two's compliment notation.
sprintf('%08b', number)
where 8 is the number of bit's in your array.
you have to specify the number of bits in order to get a two's
compliment that works, right?
10.downto(-10) do |number|
p number # the number
p number.to_s(2) #as binary (with sign)
p sprintf('%b', number) #as binary, with 'two's complement' prefixed by ..1
p sprintf('%08b', number) # as a nice proper two's complement number,
p "---"
end
-Graeme
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