What Array functions in JavaScript cause changes to the original array?

Currently, I am working on developing a custom Array class in JavaScript and I'm curious about the functions that need to be overloaded in order to track any modifications made to the array.

So far, I am aware that Array.push() and Array.splice() are considered mutating functions. However, I am wondering if there is a comprehensive list of other similar functions that I should be aware of?

Answer №2

I recently stumbled upon a fascinating website called Doesitmutate

This website provides a comprehensive list of functions and indicates whether they mutate or not.

Answer №3

To prevent mutating your arrays, it's recommended to utilize the .concat() method before applying any mutation methods. Here's an example:

const originalArray = [7,3,9,1,5];
const sortedArray = originalArray.concat().sort(...)

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