lib/core/facets/array/rotate.rb in facets-2.8.4 vs lib/core/facets/array/rotate.rb in facets-2.9.0.pre.1

@@ -1,40 +1,48 @@
 class Array
 
-  # Rotates an array's elements from back to front n times.
-  #
-  #   [1,2,3].rotate      #=> [3,1,2]
-  #   [3,1,2].rotate      #=> [2,3,1]
-  #   [3,1,2].rotate      #=> [1,2,3]
-  #   [1,2,3].rotate(3)   #=> [1,2,3]
-  #
-  # A negative parameter reverses the order from front to back.
-  #
-  #   [1,2,3].rotate(-1)  #=> [2,3,1]
-  #
-  # CREDIT: Florian Gross, Thomas Sawyer
+  unless method_defined?(:rotate)
 
-  def rotate(n=1)
-    self.dup.rotate!(n)
+    # Rotates an array's elements from back to front n times.
+    #
+    #   [1,2,3].rotate      #=> [2,3,1]
+    #   [2,3,1].rotate      #=> [3,1,2]
+    #   [3,1,2].rotate      #=> [1,2,3]
+    #
+    #   [1,2,3].rotate(3)   #=> [1,2,3]
+    #
+    # A negative parameter reverses the order from front to back.
+    #
+    #   [1,2,3].rotate(-1)  #=> [3,1,2]
+    #
+    # CREDIT: Florian Gross, Thomas Sawyer
+
+    def rotate(n=1)
+      self.dup.rotate!(n)
+    end
+
   end
 
-  # Same as #rotate, but acts in place.
-  #
-  #   a = [1,2,3]
-  #   a.rotate!
-  #   a  #=> [3,1,2]
-  #
-  # CREDIT: Florian Gross, Thomas Sawyer
+  unless method_defined?(:rotate!)
 
-  def rotate!(n=1)
-    n = n.to_int
-    return self if (n == 0 or self.empty?)
-    if n > 0
-      n.abs.times{ self.unshift( self.pop ) }
-    else
-      n.abs.times{ self.push( self.shift ) }
+    # Same as #rotate, but acts in place.
+    #
+    #   a = [1,2,3]
+    #   a.rotate!
+    #   a  #=> [2,3,1]
+    #
+    # CREDIT: Florian Gross, Thomas Sawyer
+
+    def rotate!(n=1)
+      n = n.to_int
+      return self if (n == 0 or self.empty?)
+      if n < 0
+        n.abs.times{ self.unshift( self.pop ) }
+      else
+        n.abs.times{ self.push( self.shift ) }
+      end
+      self
     end
-    self
+
   end
 
 end
-