Use toString instead of + '' to convert types

Author: tshemsedinov

JavaScript/5-serialization.js

@@ -15,6 +15,6 @@ console.dir(obj);
 console.log('person === obj is ', person === obj);
 
 const letters = ['A', 'B', 'C', 'D'];
-console.log(letters + '');
+console.log(letters.toString());
 console.log(JSON.stringify(letters));
 console.log(letters.join('---'));