Module: Utilities::Numbers

Defined in:
lib/utilities/numbers.rb

Class Method Summary (collapse)

Class Method Details

+ (Array) get_bits(number)

Returns of numbers 0 - 32

Parameters:

  • number (Integer)

Returns:

  • (Array)

    of numbers 0 - 32



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# File 'lib/utilities/numbers.rb', line 5

def self.get_bits(number)
  # created by Jim Tucker, 20161012
  # parameter is decimal number representing a bit map
  # returns an array of bits set (power of 2) starting at 0, e.g., [0, 3, 22]
  # use to decode StatusFlags in SF.tblTaxa
  ret_val = []
  counter = 0

  until number == 0
    ret_val << counter unless (number & 1) == 0 # << = push
    counter += 1
    number >>= 1 # >>= = right shift
  end

  ret_val
end