Contents

class Integer

  ROMAN_VALUES = {
    "M"  => 1000,
    "CM" => 900,
    "D"  => 500,
    "CD" => 400,
    "C"  => 100,
    "XC" => 90,
    "L"  => 50,
    "XL" => 40,
    "X"  => 10,
    "IX" => 9,
    "V"  => 5,
    "IV" => 4,
    "I"  => 1
  }

  def factorial
    return(1) if zero?
    2.upto(self).inject(1) { |product, n| product * n }
  end

  def of(&block)
    Array.new(self, &block)
  end

  def roman
    return("") if zero?
    return("-#{(-self).roman}") if self < 0

    ROMAN_VALUES.each do |key, value|
      return(key + (self - value).roman) if value <= self
    end
  end

  def time
    Time.at(self)
  end

end

Version data entries

7 entries across 7 versions & 1 rubygems

Version	Path
active_object-2.2.5	lib/active_object/integer.rb
active_object-2.2.4	lib/active_object/integer.rb
active_object-2.2.3	lib/active_object/integer.rb
active_object-2.2.2	lib/active_object/integer.rb
active_object-2.2.1	lib/active_object/integer.rb
active_object-2.2.0	lib/active_object/integer.rb
active_object-2.0.0	lib/active_object/integer.rb