Module: ActiveObject::Integer
- Defined in:
- lib/active_object/integer.rb
Instance Method Summary collapse
Instance Method Details
#factorial ⇒ Object
21 22 23 24 25 |
# File 'lib/active_object/integer.rb', line 21 def factorial return 1 if zero? 2.upto(self).inject(1) { |acc, elem| acc * elem } end |
#factors ⇒ Object
27 28 29 30 31 32 33 34 35 36 37 38 |
# File 'lib/active_object/integer.rb', line 27 def factors limit = Math.sqrt(self).floor (1..limit).each_with_object([]) do |i, acc| next unless (self % i).zero? acc.push(i) sq_num = (self / i) acc.push(sq_num) if sq_num != i end end |
#of(&block) ⇒ Object
40 41 42 |
# File 'lib/active_object/integer.rb', line 40 def of(&block) ::Array.new(self, &block) end |
#roman ⇒ Object
44 45 46 47 48 49 |
# File 'lib/active_object/integer.rb', line 44 def roman return '' if zero? return "-#{(-self).roman}" if negative? ROMAN_VALUES.each { |key, val| return "#{key}#{(self - val).roman}" if val <= self } end |
#time ⇒ Object
51 52 53 |
# File 'lib/active_object/integer.rb', line 51 def time ::Time.at(self) end |