update

Task/Sorting-algorithms-Counting-sort/Ruby/sorting-algorithms-counting-sort.rb

@@ -1,10 +1,10 @@
 class Array
-  def countingsort!
-    do_countingsort!(min, max)
+  def counting_sort
+    dup.counting_sort!
   end
 
-  protected
-  def do_countingsort!(min, max)
+  def counting_sort!
+    min, max = minmax
     count = Array.new(max - min + 1, 0)
     each {|number| count[number - min] += 1}
     z = 0
@@ -20,5 +20,6 @@ class Array
 end
 
 ary = [9,7,10,2,9,7,4,3,10,2,7,10,2,1,3,8,7,3,9,5,8,5,1,6,3,7,5,4,6,9,9,6,6,10,2,4,5,2,8,2,2,5,2,9,3,3,5,7,8,4]
-ary.countingsort!.join(",")
+p ary.counting_sort.join(",")
+
 # => "1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,4,4,4,4,5,5,5,5,5,5,6,6,6,6,7,7,7,7,7,7,8,8,8,8,9,9,9,9,9,9,10,10,10,10"