Averages/Median: Difference between revisions

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@@ Line 783: / Line 783: @@
   def median([]), do: nil
   def median(list) do
-    len = Enum.count(list)
+    len = length(list)
     sorted = Enum.sort(list)
     mid = div(len, 2)
+    if rem(len,2) == 0, do: (Enum.at(sorted, mid-1) + Enum.at(sorted, mid)) / 2,
-    rem = rem(len, 2)
-    (Enum.at(sorted, mid) + Enum.at(sorted, mid + rem - 1)) / 2
+                      else: Enum.at(sorted, mid)
   end
 end
 median = fn list -> IO.puts "#{inspect list} => #{inspect Average.median(list)}" end
 median.([])
@@ Line 800: / Line 800: @@
 <pre>
 [] => nil
-[1] => 1.0
+[4] => 4
-[4, 5] => 4.5
+[1, 6] => 3.5
-[4, 1, 3] => 3.0
+[5, 2, 4] => 4
-[6, 5, 2, 1] => 3.5
+[2, 3, 5, 1] => 2.5
-[5, 5, 4, 1, 2] => 4.0
+[3, 2, 6, 3, 2] => 3
-[2, 6, 4, 1, 3, 2] => 2.5
+[6, 4, 2, 3, 1, 3] => 3.0
 </pre>