original value

基本解釋

This function accepts a string as an argument (the original value of the field), and returns a masked version of the value.
這個函數(shù)接受一個字符串參數(shù)（該域的原始值），并返回該值的一個屏蔽版本。
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 刪除或修改一條數(shù)據(jù)庫記錄之前，它將捕獲這一原始記錄的快照并存儲其原始值，以防事務失敗。
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，需在原始值和處理后的值之間進行選擇，但是如果在兩個處理后的值之間進行選擇，則代碼也很類似。

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.
在兩種情況中，我都把結果值,再乘以2，如果x是偶數(shù)我就,得到了原來的值，如果x是奇數(shù)那么就不會得到,原來的值，因此我看看得到的值,和原來的值相等不相等就可以了。
麻省理工公開課 - 計算機科學及編程導論課程節(jié)選

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