how do i copy an array correctly

Question

im trying to make a copy of an array but when i change the copy it also changes the original. i have tried using Object.assign([], scenes), scenes.clone() and tried using a for loop

if(localStorage.getItem(saveName) == null){
    var nonLoopScenes = [...scenes];
    nonLoopScenes.forEach(element=>{
        element.objects.forEach(element2=>{
            element2.scene = null;
        });
    });
    console.log(nonLoopScenes);
    console.log(scenes);
    localStorage.setItem(saveName,JSON.stringify(scenes));
}

Does this answer your question? [What is the most efficient way to deep clone an object in JavaScript?](https://stackoverflow.com/questions/122102/what-is-the-most-efficient-way-to-deep-clone-an-object-in-javascript) — evolutionxbox, Mar 11 '21 at 12:13

score 0 · Accepted Answer · answered Mar 11 '21 at 12:11

0

You can also try const arrayCopy = JSON.parse(JSON.stringify(initialArray)), although the method using the spread operator should work as well.

answered Mar 11 '21 at 12:11

Victor Vlad

26
1

i can't do that because the scenes array has a reference to it self multiple places. exaple:` var a = {name:"Oliver"}; var b = {name:"Noah", friend:a}; a.friend = b; ` – t_ perm Mar 11 '21 at 12:40

how do i copy an array correctly

1 Answers1