How to update all items in an Array with Airbnb JavaScript Style?

Let's say that we have an array like this: let list = [ { name: '1', count: 0, }, { name: '2', count: 10, }, { name: '3', count: 18, }, ]; Then how to update all items to increase count by 1? Here comes several solutions, while none of them is quite satisfactory: /* no-restricted-syntax error, pass */ for (const item of list) { item.count += 1; } /* no-param-reassign error, pass */ list.forEach((item) => { item.count += 1; }); /* Object.assign is free to use without error but it against the intention of no-param-reassign */ list.forEach((item) => { Object.assign(item, { count: item.count + 1 }); }); /* use Array.map() to replace the original array but it costs a lot when the item is large or the array has a large length also ugly code for such a tiny update */ list = list.map((item) => ({ ...item, count: item.count + 1, })); If you have a better solution or consider Array.map() is good enough, please leave your opinion. Thank you :)