Add bin and edit workflow

bin/gems/facets-3.1.0/lib/standard/facets/math/median.rb

@@ -0,0 +1,30 @@
+require 'facets/math/percentile'
+
+module Math
+
+  # Returns the numerical median for the an array of values;
+  # or nil if array is empty.
+  #
+  def self.median(array)
+    percentile(array, 50)
+  end
+
+# better definition ?
+=begin
+  #
+  def self.median(array)
+    return 0 if array.size == 0
+
+    tmp = array.sort
+    mid = tmp.size / 2
+
+    if (tmp.size % 2) == 0
+	    (tmp[mid-1] + tmp[mid]).to_f / 2
+    else
+	    tmp[mid]
+    end
+  end
+=end
+
+end
+