// I think, that this is an interesting answer. Check if object key exists, if yes, double

const columns = [
    { name: 'one', title: 'Order Number', id: 1 },
    { name: 'two', title: 'Strawberry', id: 2 },
    { name: 'three', title: 'Vanilla', id: 3 }
];

    const mapped = columns.map(
        item => item.id ? item.id = item.id * 2 : item
    )
    console.log(columns);

// But it can be done better

const mapped = objArr.map(item => {
    item.id = item.id * 2;
    return item;
})