lib/polyfill/v2_4/array.rb in polyfill-0.6.0 vs lib/polyfill/v2_4/array.rb in polyfill-0.7.0

@@ -1,9 +1,31 @@
-require_relative 'array/instance'
-
 module Polyfill
   module V2_4
     module Array
-      include Instance
+      def concat(*others)
+        return super if others.length == 1
+
+        acc = [].concat(self)
+        others.each do |other|
+          acc.concat(other)
+        end
+
+        replace(acc)
+      end
+
+      def sum(init = 0)
+        acc =
+          begin
+            init.dup
+          rescue TypeError
+            init
+          end
+
+        each do |elem|
+          acc += block_given? ? yield(elem) : elem
+        end
+
+        acc
+      end
     end
   end
 end