How does the latter regex work?
后面的regex如何工作？
Table 1 shows some common regex operators.
表1显示了一些常用的regex操作符。
This isn't true for the regex library.
但是 regex 是一个例外。
Miscellaneous (arp, boot, regex, unix utf8)
杂项（arp、boot、regex、unixutf8）
Each regex is represented by a match element.
每个正则表达式都由一个匹配元素表示。
All regex repetition operators are greedy.
所有能多次限定的正则运算符都是贪婪的。
Here's an example of a common use of a regex.
下面是regex的常见用法示例。
Example of SQL statements using regex functions.
使用regex函数的sql语句示例。
Use the stylesheet in Listing 2 to validate the regex.
使用清单2中的样式表验证正则表达式。
Such a little program is useful if you want to test or refine a regex.
如果需要测试或改进regex，则这种小型程序非常有用。
It provides an excellent introduction to regex and has many useful examples.
它会提供regex的精彩介绍，并包含许多有用的示例。
It lets you embed whitespace in a subpattern, making the regex easier to read.
它允许您在子模式中嵌入空白，使regex更易读。
A regular expression (regex) describes patterns in a concise, readable notation.
正则表达式(regex)使用简明、易读的符号描述模式。
This function divides the string at every point that matches the provided regex.
此函数将在匹配给定regex的每个点上划分字符串。
If the specified mode is incorrect, any of the regex functions will return an error.
如果指定的模式不正确，所有regex函数都将返回错误。
Another use of regex is formatting, or normalizing or improving, the readability of data.
regex的另一个应用是格式化、规范化或提高数据的可读性。
If not zero, you may have exceeded a computing limit, such as how deeply a regex can recurse.
如果不为零，则可能已经超出计算范围，例如超出regex可以递归的深度。
More often, though, a regex is used to prove a match and to extract information about the match.
但是，regex更常用于检验匹配和提取关于匹配的信息。
Many additional text analysis components including word splitting, regex and sounds-like filters.
多个新增的文本分析组件，包括分词、正则表达式过滤器和近似读音过滤器。
In programming, a regular expression is written in a formal language, also known as regex or regexp.
在编程中，正则表达式是用一种形式语言编写的，也称为regex或regexp。
The re module obsoletes the regex and regsub modules that you may see used in some older Python code.
re模块废弃了在老的Python代码中使用的regex和regsub模块。
Table 1 provides a list of the POSIX regex functions that will not be available after ereg is removed.
表1列出了删除ereg之后将不可用的POSIX正则表达式函数。
Note: The i modifier at the end of the regex makes all matches within the pattern, case-insensitive.
注：使用 regex 末尾的i修饰语可以使模式内的所有匹配都不区分大小写。
Finally, the regex man page, available on many UNIX systems, provides information on building POSIX regexps.
最后，很多UNIX系统上提供的regex手册页提供了有关构建POSIX regexp的信息。
Finally, the regex man page, available on many UNIX systems, provides information on building POSIX regexps.
最后，很多UNIX系统上提供的regex手册页提供了有关构建POSIX regexp的信息。
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