Transparency: The pre - and post-condition code isn't mixed with business logic.

透明性：前置和后置条件代码不与业务逻辑混合。

If a user is not authenticated when trying to access this resource, the user will receive a 401 status code and the application can provide a special error handler to deal with that condition.

如果用户在尝试访问这个资源时还没有经过身份验证，那么用户会收到401状态码，应用程序可以提供一个特殊的错误处理函数来处理这种情况。

So double bar means if this condition or this one — and maybe even both — are true, go down this road and execute that code.

所以复纵线意思是，如果这两个条件之一-，或者两个都——是成立的，那就继续，执行后面的代码。

Creation of the rule essentially means creating the rule target and the condition; these are also demonstrated with their own code listings.

创建规则实质上意味着创建规则目标和条件，这些都使用它们自己的代码清单作了说明。

You can measure code coverage in several ways: by assessing line or statement coverage, condition coverage, branch coverage, and so on.

您可以通过许多方法来测量代码覆盖率：通过评估代码行或语句的覆盖面、条件覆盖面、分支覆盖面等等。