: The JSE2 syllabus on the Edube Interactive or Cisco Networking Academy website is your study guide. Use it to identify topics you need to focus on.
Every JavaScript object has an internal property called [[Prototype]] , which points to another object. When you attempt to access a property that does not exist on the base object, JavaScript searches up this chain until it finds the property or hits null . javascript cisco javascript essentials 2 answers exclusive
Take the concepts from this guide—closures, prototypes, async patterns, and DOM events—and build a small project (e.g., a to-do app or a promise-based weather widget). That will cement the knowledge far better than memorizing Q&A pairs. : The JSE2 syllabus on the Edube Interactive
B) new Set(arr) (in combination with the spread operator) Explanation: The most elegant way is to use a Set . Sets store unique values of any type. To convert it back to an array, you would use the spread operator: arr = [...new Set(arr)] . The filter option (D) also works, but the Set method is generally preferred for its readability and performance. When you attempt to access a property that
Expect questions testing your knowledge of constructor behavior in inherited classes. javascript