let items = obj;

​

for (let i = 0; i < 100; i++) {

    items = obj;

    const newItems = {

        ...items,

        5050: 'newDataObj'

    }

​

    const copyItems = { ...items }

    delete copyItems['5050']

​

    items = [];

}

let items = array;

​

for (let i = 0; i < 100; i++) {

    items = array;

    const index = items.findIndex((item) => item.id === 5050) || null;

    if (index) {

        items[index] = 5050

    } else {

        items.push({ id: 5050 })

    }

    items.filter((item) => item.id !== 5050)

    items = [];

}