命名参数和可选参数是两个比较简单的特性，对于熟悉其他编程语言的开发者来说可选参数并不陌生，为参数提供默认值时就是可选参数：
Pick the check box by Just about every type of file. (Be certain there’s almost nothing crucial inside your Recycle Bin right before emptying it.)
four Correct click on or push and keep on an vacant location of the folder's background, click on/tap on Type by, and click/faucet on Ascending (default) or Descending with the get you want. (see screenshot underneath)
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SSL certificates are often employed by legit and Secure Internet websites. Regrettably scammers significantly also use SSL certificates so it's no promise that you'll be checking out a reliable Web page.
Zipped (compressed) documents take up much less storage space and will be transferred to other desktops additional promptly than uncompressed documents.
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注意这段代码创建了三个文件流：fin，表示明文形式的原始文件；fout，加密结果文件；crStream，加密流，用来把DES加密的结果转入输出文件fout。增加一个crStream流的好处是不必把结果保存到临时文件或缓冲区。
针对泄密的最佳防范措施就是加密。有效的加密不仅杜绝了泄密，而且还防范了由泄密引发的攻击。加密技术有时还用于通信过程中的身份验证——如果某个用户知道密码，那么他应该就是那个拥有这一身份的人。
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Even though you don’t see updates that demand restarting, doing so makes sure that any pending updates are installed.
而这种原始转换（由子类转换为父类）方向相同的可变性，被称为协变（covariant）；其反向操作则被称为逆变（contravariant）。当同样的情形应用于泛型时，例如：
From the Privateness area, very clear the Verify boxes and choose Utilize. Now Speedy entry will only demonstrate your pinned folders. (If you turn them back on, files you previously faraway from Speedy entry may well present up again.)