你可以改变模式串，以显示或改变特定类型的文件。
You can vary the pattern to show and change only certain types of files.
此外，算法还支持带循环引用路径信息的模式串匹配。
In addition, the algorithm support pattern matching with loop reference path information.
用户注册中心人员解析插件还利用用户注册中心功能来基于搜索模式字符串搜索某个人员或组。
The user registry staff resolution plug-in also leverages the user registry functionality to search for a person or group based on a search pattern string.
当这个应用程序显示一个约会列表时，它检测那些无效记录的字符串模式，然后跳过它们。
As the application displays a list of appointments, it detects the string pattern of those invalid records and skips them.
这个信息被与原先用于搜索的字符串模式附加在一起。
This information is appended with the string pattern originally used for the search.
如果您忽略了此参数或传递空字符串，则将使用默认匹配模式。
If you omit this parameter or pass an empty string, the default matching modes are used.
这些函数使用的所有模式均仅为字符串，这意味着其中任何一个都可存储在数据库中的一个表中。
All of the patterns used by these functions are just strings, which means that any of them can be stored in a table within your database.
此函数在字符串中搜索给定模式并用新的值替换它们。
This function searches for given patterns in a string and replaces them with a new value.
如果使用圆括号将模式元素括起来，您可以在替换字符串中使用匹配的内容。
If you wrap pattern elements in parentheses, you can use the matched contents in the replacement string.
通过使用正则表达式引擎，很容易测试出字符串是否与模式匹配。
Using a regular expression engine, it is easy to test if a string matches the pattern.
例如，假设您并不想对属性名和字符串模式进行比较，而只是想查明具有该属性名的属性是否一直保存在持久性数据库中。
For example, perhaps you do not simply want to compare the attribute name to a string pattern, but actually look up whether the name is an attribute that has been stored in a persistent database.
并非确定字符串是否与模式匹配，它有时需要提取每个匹配项。
Rather than determining if a string matches a pattern, it is sometimes desirable to extract every match.
正则表达式用来基于字符、频率和字符顺序定义字符串中的模式。
Regular expressions are used to define patterns in strings based on characters, frequency, and character order.
但是，由于模式接受空值作为字符串的有效输入，因此，在表单中字符串类型的元素并不显示为必填的。
However, elements of type string do not appear as mandatory in the form because the schema accepts an empty value as valid input for a string.
即使在这样一小段脚本中，您也可以找到一些参数扩展，包括长度、子字符串、模式匹配和模式替换。
You'll recognize several parameter expansions, including length, substring, pattern matching, and pattern replacement in even this short piece of script.
模式字符串被解析之后，它的全名和模式名都存储在注册表中。
After the schema string is parsed, its full name and schema name are stored in the registry.
简而言之，正则表达式描述字符串模式。
In a nutshell, a regular expression describes a string pattern.
相关信息也是通过查找某些特定的字符串模式来获取的。
The related information is also obtained by looking for certain string patterns.
与完全自由的字符串或者模式验证所造成的负担相比，这当然算不了一个大问题。
It's certainly less of a problem than either having a free-for-all string or the burden of bringing in schema validation.
此函数试图匹配并返回正则表达式针对源字符串定义的模式的特定发生项。
This function attempts to match and return a specific occurrence of a pattern that is defined by the regular expression against the source string.
如果您省略了表名(即指定NULL或空字符串)，那么为指定的模式中的所有表返回信息。
If you omit a table name (that is, you specify NULL or an empty string), information is returned for all tables in the schema specified.
清单11 所示的模式指定将所有基元素作为字符串处理。
The schema shown in Listing 11 specifies that all base elements are treated as strings.
如果使用可预测的模式分隔子字符串，则前者可以将字符串分解成几个子字符串。
The former can decompose a string into substrings if the substrings are separated by a predictable pattern.
对于每一个要解析的新模式，该实现在注册表中搜索已保存的完全限定模式名，并且在给定的模式中做字符串替换。
For every new schema it is parsing, the implementation looks for a fully qualified schema name, that is already stored in the registry and is doing string replacement in a given schema.
正则表达式是描述一组字符串的字符模式。
A regular expression is a pattern of characters that describes a set of strings.
例如，QEMU的模拟硬盘会返回“QEMUHARDDISK”的模式字符串，与真实的硬盘驱动器不同。
For instance, QEMU's emulated hard disks return a model string of "QEMU HARDDISK" rather than a real hard disk manufacturer and model.
确定字符串是否与模式匹配是对正则表达式的最简单应用，如图1所示，而且易于操作。
Determining if a string matches a pattern is the simplest use of regular expressions and, as you see in Figure 1, it's, easy to do.
此函数试图匹配正则表达式针对源字符串的模式的特定发生项。
This function attempts to match a specific occurrence of the pattern that is defined by the regular expression against the source string.
例如，格式字符串确定定义消息的WSDL和模式。
The format string identifies, for example, the WSDL and schema that define the message.
如果模式是NULL或空字符串，那么这个过程采用备份时的模式名进行恢复。
If the schema is NULL or the empty string, the procedure restores the schema to the name from where it was backed up.
应用推荐