Discussion on: Share a quick tip you learned about web dev this year

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Replies for: really? that was super simple bro //lets say you have an array like this let animal=['panda','cat','mongoose']; //then if you want to clone it o...

Sweet. Definitely useful! Thanks

i found it here the original post

Awais

@mrahmadawais

Which method do you prefer to clone an array, and why?

1️⃣ [...arr];
2️⃣ arr.slice(0);
3️⃣ Array.from(arr);
4️⃣ arr.map((x) => x);
5️⃣ arr.concat([]);
6️⃣ JSON.parse(JSON.stringify(arr));

#OneDevMinute #JavaScript #CodeNewbie

14:41 PM - 08 May 2020

229 1105

Derek D • Jun 27 '20

You can do the same with objects. Keep in mind, this doesn't deep clone. So if you intend to change the values in any way, you'll still be mutating the pointer, and by consequence, the original object.