Bunlong
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@@ -60,4 +60,18 @@ We concentrate on the language itself here, with the minimum of environment-spec
 
 3.5 Automated testing with mocha
 
-3.6 Polyfills
+3.6 Polyfills
+
+### Code quality
+
+4.1 Objects
+
+4.2 Garbage collection
+
+4.3 Symbol type
+
+4.4 Object methods, "this"
+
+4.5 Object to primitive conversion
+
+4.6 Constructor, operator "new"