module HumanizeNumber

# File lib/humanize-number.rb, line 8
def self.humanize(number)
  return number.to_s unless number.is_a?(Numeric)

  case 
  when number.abs < THOUSAND
    number.to_s
  when number.abs < MILLION
    "#{(number / THOUSAND.to_f).round(3 - num_of_digits(number / THOUSAND))}k"
  when number.abs < BILLION
    "#{(number / MILLION.to_f).round(3 - num_of_digits(number / MILLION))}m"
  else
    "#{(number / BILLION.to_f).round([3 - num_of_digits(number / BILLION), 0].max)}b"
  end
end

# File lib/humanize-number.rb, line 25
def self.num_of_digits(number)
  Math.log10(number.abs).to_i + 1
end