What is the difference between shallow and deep merge in programming?

Can you explain the difference between shallow and deep merge?

Sure! A shallow merge combines objects at the first level, while a deep merge combines all levels recursively.

Can you give me an example of a shallow merge?

Of course! If you have two objects, {a: 1, b: 2} and {b: 3, c: 4}, a shallow merge would result in {a: 1, b: 3, c: 4}.

And what about a deep merge?

In a deep merge, if you have {a: {x: 1}, b: 2} and {a: {y: 2}, b: 3}, the result would be {a: {x: 1, y: 2}, b: 3}.

Thanks! How do I implement a deep merge in JavaScript?

You can use libraries like Lodash with its _.merge function, or implement your own recursive function to achieve this.