按顺序检查文件是否存在，返回第一个找到的文件。
Checks for the existence of files in order, and returns the first file that is found.
接下来，使用ls命令检查文件是否存在(见清单5)。
Next, you can check for the presence of the files using the ls command (see Listing 5).
检查文件中是否存在欺诈性的首选项或可检查的事务。
Review the file for any fraudulent preferences or reviewable transactions.
读取初始化文件后，将检查是否存在新的电子邮件。
After reading the initialization file, the presence of new E-mail is checked.
清单6显示了用来检查该文件是否存在的语法。
Listing 6 shows the syntax that checks to see if the files exist.
还可以检查远程主机上的文件或目录是否存在。
You can also test whether the file or directory on the remote host is present.
第一次，您必须检查是否存在存档文件。
The first time, you must check if the archived file is present.
更令人厌恶的代码，用于检查即将上载的远程文件是否存在。
More nasty code to check of the remote file we're uploading to exists.
浏览器将检查是否存在新的清单文件。
The browser will check to see if there is a new manifest file.
PL运行时，它首先检查MANIFEST，并检查是否存在项目所需的所有文件。
When Makefile.PL is run, it first examines MANIFEST, and checks that all the files required for the project are present.
检查这个位置上是否存在plugin . xml或fragment . xml文件。
Check whether plugin.xml or fragment.xml files exist at that location.
我之所以可以这样做是因为此文件的顶部包含if语句，该语句可以检查潜在的输入字段store是否存在，而这永远被设置为True。
I can do this because the top of this file contains an if statement that checks for the existence of the hidden input field named store, which is always set to True.
jsp文件中下面的代码片段检查是否存在名为 tableColor 的请求参数。
The following section from the codegen.jsp file checks for the existence of a request parameter called tableColor.
existsFlatFile—检查特定的文件是否存在。
从性能来看，文件状态调用(即为检查一个文件是否存在而对底层文件系统进行的调用)相当昂贵。
File status calls (meaning calls made to the underlying file system to check for the existence of a file) can be quite costly in terms of performance.
如果文件存在，则应检查文件内容是否正确。
If the files are present, check whether the contents are correct.
将创建的BAR文件部署到代理，并检查是否存在任何错误消息。
Deploy the created BAR file to the broker and check for any error messages.
一旦对所有用例都完成了，我们就分析代码的实现模型来检查某些类（文件）的逻辑分组是否已经在代码中存在。
Once this is done for all the use cases, we analyze the Implementation Model of the code to check if some logical grouping of the classes (files) already exists in the code.
在部署过程中，将检查消息流中使用的安全性配置文件是否存在。
During the deployment process, the existence of the security profiles used in the message flows is checked.
这些操作的示例包括创建文件、在文件中写入数据或检查特定的文件是否存在。
Example operations include creating a file, writing to a file, or checking if a specific file exists.
在RPC内没有OPEN程序；反之，客户端仅检查目录和文件是否存在于所加载的文件系统中。
There's no OPEN procedure within RPC; instead, the client simply checks to see if the directory and file exist within the mounted file system.
检查源文件和目录是否存在，以及环境的设置是否正确。
The checks ensure the existence of the source file(s) and directory, and that the environment is set properly.
项目完成时，您可以验证是否获得预期结果，方法就是检查下面两个文件是否存在。
When the project is complete, you can verify that it had the intended results by checking for the presence of the following two files.
chkpolicy命令会验证策略的所有规则并检查在gpfs0文件系统中是否确实存在名为secret的有效存储池。
The chkpolicy command validates all the rules of policy and checks that there is a valid storage pool named secret in the gpfs0 filesystem.
在这个示例中，您可以在源代理SOURCEAGENT上定义新的监控器VarSubResourceMonitor，检查目录c： \monitored中是否存在扩展名为. txt的文件或那些文件是否被更新。
In this example, you define the new monitor VarSubResourceMonitor on the source agent SOURCEAGENT, monitoring directory c: \ monitored for the existence or update of any file with the extension.txt.
pam_permission模块会检查是否存在选择性指定的文件，然后读取此文件来确定某个用户/组是否被赋予/拒绝访问。
The pam_permission module checks for the existence of an optionally specified file and then reads the file to determine if a user/group is granted/denied access.
增加的代码用于检查 parameters.xml.done文件是否存在，因为如果这个文件已经存在，意味着 RDS安装已经完成，不应该再次安装。
The added code checks to see if the parameters.xml.done file is not present because if this file is already present, that means that the RDS installation is already done and should not be done again.
函数的作用是：检查文件或目录是否存在。
The file_exists() function checks whether or not a file or directory exists.
我喜欢长时间运行的任务有内部功能检查是否存在一个给定名称的文件，如果这样，源到它的环境。
For long-running tasks I like to have the inner function check to see if there exists a file of a given name and if so, source it into its environment.
检查TNSNAMES.ORA文件是否存在，它所在的目录是否正确和可访问。
Verify that a TNSNAMES. ORA file exists and is in the proper directory and is accessible.
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