In addition, there is now a second check so that the identity of the certificate matches some string that the administrator has designed to filter out all but a known set of legitimate users.

此外，现在还有第二项检查，目的是让证书标识匹配某个字符串，管理员已将该字符串设计为过滤出除已知合法用户之外的所有用户。

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Listing 8 demonstrates how to check a JSON string with a regular expression.

清单8演示了如何使用正则表达式检查JSON字符串。

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For example, Line 2 shows a check that determines if an empty string has been provided.

例如，第2行检查提供的是否是空字符串。

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From the outcry, you'd think New York residents were being asked to pay a "spell-check tax" every time they fixed a string of letters in Microsoft Word.

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