lib/polyfill/v2_6/hash.rb in polyfill-1.7.0 vs lib/polyfill/v2_6/hash.rb in polyfill-1.8.0

@@ -1,41 +1,59 @@
 module Polyfill
   module V2_6
     module Hash
+      def to_h
+        return super unless block_given?
+
+        block = ::Proc.new
+
+        pairs = map do |k, v|
+          pair = block.call(k, v)
+
+          unless pair.respond_to?(:to_ary)
+            raise TypeError, "wrong element type #{pair.class} (expected array)"
+          end
+
+          pair = pair.to_ary
+
+          unless pair.length == 2
+            raise ArgumentError, "element has wrong array length (expected 2, was #{pair.length})"
+          end
+
+          pair
+        end
+
+        pairs.to_h
+      end
+
       def merge(*args)
         if block_given?
-          block = ::Proc.new
-
           args.each_with_object(dup) do |arg, h|
-            h.merge!(arg, &block)
+            h.merge!(arg, &::Proc.new)
           end
         else
           args.each_with_object(dup) do |arg, h|
             h.merge!(arg)
           end
         end
       end
 
       def merge!(*args)
         if block_given?
-          block = ::Proc.new
-
           args.each_with_object(self) do |arg, h|
-            h.merge!(arg, &block)
+            h.merge!(arg, &::Proc.new)
           end
         else
           args.each_with_object(self) do |arg, h|
             h.merge!(arg)
           end
         end
       end
 
       def update(*args)
         if block_given?
-          block = ::Proc.new
-
           args.each_with_object(self) do |arg, h|
-            h.update(arg, &block)
+            h.update(arg, &::Proc.new)
           end
         else
           args.each_with_object(self) do |arg, h|
             h.update(arg)
           end