I have a quick question regarding JavaScript objects. If I create an object like this: `const user = { profile: { age: 25 } };`, and then I make a shallow copy with `const clone = { ...user };`, what happens if I change `clone.profile.age` to 30? What will `console.log(user.profile.age);` output? I'm curious to hear your thoughts!
2 Answers
That's a great question! Practical understanding of this concept is key. You can create a shallow copy, but remember that nested objects still reference the original memory location. If you need to make sure that nested objects are also duplicated, you'd have to use a deep copy method instead.
The answer is 30! When you create a shallow copy, like with the spread operator, it only copies the top-level properties. Because `profile` is a nested object, both `user` and `clone` references point to the same memory location for the `profile` object. So modifying `clone.profile.age` actually changes `user.profile.age` too.
Related Questions
How To: Running Codex CLI on Windows with Azure OpenAI
Set Wordpress Featured Image Using Javascript
How To Fix PHP Random Being The Same
Why no WebP Support with Wordpress
Replace Wordpress Cron With Linux Cron
Customize Yoast Canonical URL Programmatically