original value

基本解释

This function accepts a string as an argument (the original value of the field), and returns a masked version of the value.
这个函数接受一个字符串参数（该域的原始值），并返回该值的一个屏蔽版本。
Before IDS deletes or modifiesy a database record, it will take a snapshot of the original record and store its original value in case the transaction fails.
在 IDS 删除或修改一条数据库记录之前，它将捕获这一原始记录的快照并存储其原始值，以防事务失败。
In this case, the choice was between the original value and a processed value, but the code would have been similar if the choice was between two processed values.
在本例中，需在原始值和处理后的值之间进行选择，但是如果在两个处理后的值之间进行选择，则代码也很类似。

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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