ruby - flatten-array

ruby/flatten-array/flatten_array.rb

@@ -0,0 +1,16 @@
+class FlattenArray
+  def self.flatten(array)
+    recursive_flatten(array)
+  end
+
+  def self.recursive_flatten(array, result = [])
+    array.each do |a|
+      if a.is_a? Array
+        recursive_flatten(a, result)
+      else
+        result << a unless a.nil?
+      end
+    end
+    result
+  end
+end