JavaScript question detail
What is the difference between slice and splice
Here are the key differences between slice() and splice() methods in JavaScript arrays:
slice() | splice() |
|---|---|
| Does not modify the original array (immutable) | Modifies the original array (mutable) |
| Returns a shallow copy (subset) of selected elements | Returns an array of the removed elements |
| Used to extract elements from an array | Used to add, remove, or replace elements in an array |
Syntax: array.slice(start, end) | Syntax: array.splice(start, deleteCount, ...items) |
Summary:
- Use
slice()when you want to copy or extract elements without altering the original array. - Use
splice()when you need to add, remove, or replace elements and want to change the original array.