rashmi agar
5 posts
Mar 07, 2025
8:43 PM
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Hey folks,
I just learned about the js copywithin in JavaScript, and I’m trying to figure out the best use cases for it. I understand that it allows us to copy elements within the same array without modifying its length.
Example:
javascript
Copy
Edit
let arr = ['a', 'b', 'c', 'd', 'e'];
arr.copyWithin(1, 3);
console.log(arr); // ['a', 'd', 'e', 'd', 'e']
A few things I’d love to clarify:
Does copyWithin() work on sparse arrays?
Is it a performance-friendly alternative to other array modification methods?
Can it be used effectively in real-world applications?
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