defensive copy中文

保護性拷貝

• defensive:    adj. 1.防衛的，防御的；守勢的。 2.辯護的。 短 ...
• copy:    n. 1.抄本，繕本，謄本，摹本，復制品，【電影】拷貝； ...

例句與用法

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1. Prudence would dictate that defensive copies are needed when calling them , too
   謹慎的做法是，在調用存取器方法時也使用防御性副本。
2. You must also be prepared to accept the performance overhead of making defensive copies where necessary
   您還要準備著接受在必要時創建防御副本的性能開銷。
3. And in the absence of clear documentation , you must make defensive copies on both sides of a method call
   而缺乏清楚的文檔說明時，您必須在方法調用的兩邊都創建防御副本。
4. Accessors for immutable properties will always have value semantics and do not need the defensive copying on either side of the call , making them more efficient
   不可變屬性的存取器將總是具有值引用，因而調用的任何一方都不需要防御性復制，這使得它們效率更高。
5. Every time an object on the screen moved even the mouse probably seemed daunting at the time , and the overhead of making defensive copies probably seemed out of the question . in hindsight , the decision to make
   那時，每當一個對象（甚至是鼠標）在屏幕上移動就創建一個新的point的對象創建開銷可能有些讓人生畏，而創建防御性副本的開銷則不在話下。