The original value of the feedback message is a blank string.
反馈消息的初始值是一个空白字符串。
If a service updates a record, the compensation restores the original value.
如果一个服务更新一条记录,补偿则恢复原始值。
If the value is found, it is stored in the resulting document in place of the original value.
如果找到了该值,那么将其存储在结果的文档中,替换原始的值。
In either case, I take that value and multiply back by two, if it was even I get back the original number, if it was odd, I'm not going to get back the original number, so I can just check to see if they're the same.
在两种情况中,我都把结果值,再乘以2,如果x是偶数我就,得到了原来的值,如果x是奇数那么就不会得到,原来的值,因此我看看得到的值,和原来的值相等不相等就可以了。
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