What is shallow comparison in JavaScript?

What is shallow comparison in JavaScript?

Shallow comparison in JavaScript checks if two variables reference the same object or if their primitive values are equal.

Can you give me an example of shallow comparison?

Sure! For instance, if you have two arrays: let a = [1, 2]; let b = [1, 2];, a shallow comparison (a == b) will return false because they reference different objects.

What about deep comparison? How is it different?

Deep comparison checks the values of nested objects or arrays, ensuring that all elements are equal, not just the references.

When should I use shallow comparison?

Use shallow comparison when you only need to check if two references point to the same object or if primitive values are equal.