lib/sugar-high/range.rb in sugar-high-0.7.1 vs lib/sugar-high/range.rb in sugar-high-0.7.2

@@ -1,12 +1,26 @@
 class Range  
+  def intersection(other)  
+    raise ArgumentError, 'value must be a Range' unless other.kind_of?(Range)  
+  
+    min, max = first, exclude_end? ? max : last  
+    other_min, other_max = other.first, other.exclude_end? ? other.max : other.last  
+  
+    new_min = self === other_min ? other_min : other === min ? min : nil  
+    new_max = self === other_max ? other_max : other === max ? max : nil  
+  
+    new_min && new_max ? new_min..new_max : nil  
+  end
+
   def intersect(other)  
     raise ArgumentError, 'value must be a Range' unless other.kind_of?(Range)  
 
     new_min = self.cover?(other.min) ? other.min : other.cover?(min) ? min : nil  
     new_max = self.cover?(other.max) ? other.max : other.cover?(max) ? max : nil  
 
     new_min && new_max ? new_min..new_max : nil  
+
+  rescue # if above doesn't work for ruby version
+    intersection(other)
   end  
-  alias_method :intersection, :intersect
-  alias_method :&, :intersection  
+  alias_method :&, :intersect
 end