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

@@ -5,9 +5,33 @@
         arrays.reduce([*self]) do |me, array|
           me - array
         end
       end
 
+      def to_h
+        return super unless block_given?
+
+        block = ::Proc.new
+
+        pairs = map.with_index do |elem, i|
+          pair = block.call(elem)
+
+          unless pair.respond_to?(:to_ary)
+            raise TypeError, "wrong element type #{pair.class} at #{i} (expected array)"
+          end
+
+          pair = pair.to_ary
+
+          unless pair.length == 2
+            raise ArgumentError, "wrong array length at #{i} (expected 2, was #{pair.length})"
+          end
+
+          pair
+        end
+
+        pairs.to_h
+      end
+
       def union(*arrays)
         return self | [] if arrays.empty?
 
         arrays.reduce(self) do |me, array|
           me | array