lib/easystats.rb in easystats-0.3.1 vs lib/easystats.rb in easystats-0.3.2

@@ -1,18 +1,18 @@
 class Array
   # take in an array of numbers and calculate the mean (average)
   def mean
-    return unless self.any?
+    return if self.empty?
 
     self.sum / self.count.to_f
-  end unless Array.method_defined? :mean
+  end unless method_defined? :mean
 
-  alias_method :average, :mean unless Array.method_defined? :average
+  alias_method :average, :mean unless method_defined? :average
 
   # take in the array of numbers and calculate the median
   def median
-    return unless self.any?
+    return if self.empty?
 
     data = self
 
     halfway = data.count / 2
 
@@ -28,15 +28,15 @@
     else
       median = data[halfway]
     end
 
     median
-  end unless Array.method_defined? :median
+  end unless method_defined? :median
 
   # take in an array of numbers and return the mode
   def mode
-    return unless self.any?
+    return if self.empty?
 
     # Sort the array
     data = self.sort
 
     # create a flag to tell the user if all the numbers only appear once
@@ -90,37 +90,37 @@
         nil
       else
         highest_value
       end
     end
-  end unless Array.method_defined? :mode
+  end unless method_defined? :mode
 
   # take in an array of numbers and calculate the range
   def range
-    return unless self.any?
+    return if self.empty?
 
     data = self.sort
     data.last - data.first
-  end unless Array.method_defined? :range
+  end unless method_defined? :range
 
   # take in an array of numbers and calculate the standard deviation
   def standard_deviation
-    return unless self.any?
+    return if self.empty?
     return 0 if self.one?
 
     Math::sqrt(self.sum_of_deviations_squared / (self.count-1))
-  end unless Array.method_defined? :standard_deviation
+  end unless method_defined? :standard_deviation
 
   # take in an array of numbers and calculate the sum
   def sum
     self.reduce { |total, number| total + number }
-  end unless Array.method_defined? :sum
+  end unless method_defined? :sum
 
   def variance
-    return unless self.any?
+    return if self.empty?
 
     self.sum_of_deviations_squared / self.count.to_f
-  end unless Array.method_defined? :variance
+  end unless method_defined? :variance
 
   protected
 
   # this function returns the sum of each squared difference of mean
   def sum_of_deviations_squared