数组中的第一个值——上一个订单——用response[0]访问，被设置为ID为“order”的字段的值。

The first value — the customer's last order — is accessed in the array as response [0] and is set as the value of the field with an ID of "order."

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在被调用函数中，可以通过数组下标访问或修改数组元素的值。

By subscripting this value, the function can access and alter any argument of the array.

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