factorial.rb in facets-2.2.0

- old
+ new

@@ -1,40 +1,23 @@
-# = FILE
-#
-#   interger/factorial.rb
-#
-# = DESCRIPTION
-#
-#   Factorial extension for Integer class.
-#
-# = AUTHORS
-#
-#   CREDIT Malte Milatz
-
-#
-
 class Integer
 
   # Calculate the factorial of an integer.
   #
   #   2.factorial  #=> 2
   #   3.factorial  #=> 6
   #   3.factorial  #=> 24
   #
+  #  CREDIT: Malte Milatz
 
   def factorial
     return 1 if zero?
     f = 1
     2.upto(self) { |n| f *= n }
     f
   end
 
-  #--
-  # TODO Pick one of these and deprecate the other. But which?
-  #++
   alias_method( :fac, :factorial )
-  alias_method( :fact, :factorial )
 
   #-- OLD CODE
   #def factorial
   #  return 1 if self == 0
   #  #self == 0 ? 1 : ( self * (self-1).factorial )
@@ -42,31 +25,5 @@
   #  return self < 0 ? -f : f
   #end
   #++
 
 end
-
-
-
-#  _____         _
-# |_   _|__  ___| |_
-#   | |/ _ \/ __| __|
-#   | |  __/\__ \ |_
-#   |_|\___||___/\__|
-#
-=begin test
-
-  require 'test/unit'
-
-  class TCInteger < Test::Unit::TestCase
-
-    def test_factorial
-      assert_equal(  1, 0.factorial )
-      assert_equal(  1, 1.factorial )
-      assert_equal(  2, 2.factorial )
-      assert_equal(  6, 3.factorial )
-      assert_equal( 24, 4.factorial )
-    end
-
-  end
-
-=end