class Aruba::Contracts::IsPowerOfTwo

Is value power of two

def self.valid?(value)

Parameters:
  • value (Integer) -- 
def self.valid?(value)
  # explanation for algorithm can be found here:
  # http://www.exploringbinary.com/ten-ways-to-check-if-an-integer-is-a-power-of-two-in-c/
  value.positive? && (value & (value - 1)).zero?
rescue StandardError
  false
end