Which JavaScript Array functions are mutating?

JavascriptArraysMutable

Javascript Problem Overview

I am writing an Array-derived class in JavaScript and need to know which functions to overload so that I can be aware of changes made to the array.

I know Array.push() and Array.splice() are mutating. Is there a definitive list of any others?

Javascript Solutions

Solution 1 - Javascript

You can find the list on MDN as Mutator methods (along with Accessor and Iteration methods):

Solution 2 - Javascript

You can also use .concat(), before using your mutation method, to ensure you are not mutating your arrays, eg

const dontMutateMe = [4,5,1,2,3];
const sortArray = dontMutateMe.concat().sort(...)

Solution 3 - Javascript

I found this website called Doesitmutate

Have the list of all functions - and tells whether it mutates or not.

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
Questiondevios1View Question on Stackoverflow
Solution 1 - JavascriptJonathan LonowskiView Answer on Stackoverflow
Solution 2 - JavascriptVinnie JamesView Answer on Stackoverflow
Solution 3 - JavascriptSoorajView Answer on Stackoverflow