JavaScript 将对象解构为其他对象设置默认值

Question

我正在从数组中解构对象的值。如果数组为空，则会发生错误。如果数组为空，如何设置默认值？

如果我正在解构的数组为空，则会发生错误：

"TypeError","message":"无法解构 'undefined' 或 'null' 的属性 payments。"

解构代码（await (...).toArray()返回数组[ { payments: @integer } ]）：

    ({
        [0]: { payments: users.finances.payments = 0 },
    } = await (
        await payments_collection.aggregate([
            {
                $group: {
                    _id: null,
                    payments: { $sum: '$coins' },
                },
            },
        ])
    ).toArray());

Answer 1

@adiga，感谢您的回答。

我用[{ payments: users.finances.payments = 0 } = {}]替换了{ [0]: { payments: users.finances.payments = 0 } }

新的工作代码：

    [{ payments: users.finances.payments = 0 } = {}] = await (
        await payments_collection.aggregate([
            {
                $group: {
                    _id: null,
                    payments: { $sum: '$coins' },
                },
            },
        ])
    ).toArray();