lib/core/facets/integer/factorial.rb in facets-2.8.4 vs lib/core/facets/integer/factorial.rb in facets-2.9.0.pre.1

- old
+ new

@@ -2,11 +2,11 @@ # Calculate the factorial of an integer. # # 2.factorial #=> 2 # 3.factorial #=> 6 - # 3.factorial #=> 24 + # 4.factorial #=> 24 # # CREDIT: Malte Milatz def factorial return 1 if zero? @@ -14,17 +14,8 @@ 2.upto(self) { |n| f *= n } f end alias_method( :fac, :factorial ) - - #-- OLD CODE - #def factorial - # return 1 if self == 0 - # #self == 0 ? 1 : ( self * (self-1).factorial ) - # f = (1..self.abs).inject { |state, item| state * item } - # return self < 0 ? -f : f - #end - #++ end