RegEx

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。

If a complete match is found at the current position in the string , the regex declares success .

如果在字符串的当前位置上发现一个完全匹配，那么正则表达式宣布成功。

It then uses one regex function to read in each book item .

然后用一个regex函数读取每个图书项目。

To create one , you simply use the / regex / syntax .

要创建正则表达式，只需使用/regex/语法。

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。

Regular expression ( regex ) matching is a crucial task in network security .

正则表达式匹配是网络安全领域的一个关键技术。

Slow regex processing is usually caused by slow failure rather than slow matching .

正则表达式处理慢往往是因为匹配失败过程慢，而不是匹配成功过程慢。

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。

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

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。

This log regex adds three alternatives to the previous regex .

这条正则式在前一条的基础上增加了三种备选匹配项。

The pattern emulates the functions of a traditional JavaScript regular expression ( regex ) .

该模式模拟了传统JavaScript正则表达式（regex）的函数。

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。

Regex : Download a free copy of Henry Spencer 's regular expression libraries .

regex：下载HenrySpencer的正则表达式库。

Users of your regex will be able to easily understand and modify the pattern to meet their needs .

你的正则的使用者可以方便地明白和修改以达到他们的需求。

The input has to match the defined pattern structure of the regex before it can be validated .

输入必须与regex定义的模式结构匹配，才可以进行验证。

Atomic groups are special regex groups that are non-capturing .

原子组是正则的群组里特殊的一种，它不被捕获。

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。

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。

The regex must try all of these permutations before giving up on the match attempt .

正则表达式在最终放弃匹配之前必须尝试所有的排列组合。

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。

To demonstrate the problem , consider the following regex , which is designed to match an entire HTML file .

为说明此问题，考虑下面的正则表达式，它的目标是匹配整个HTML文件。

Note : We did not implement full regex to validate the URLs , which would be a good idea .

注意：我们并没有实现完整的正则表达式来验证URL，这其实是一种好的做法。

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POSIXregexp的信息。

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 leading and trailing slash shown in the code simply indicate the start and end of the regex .

代码中的首尾斜杠只表示regex的开头和结尾。

We can now see that our regex has turned into a simple " program " that will be executed later .

可以看到，正则表达式已经被转化为一个稍后可供运行的简单“程序”。

Remove the question marks after the quote characters if you will use this regex to extract URLs .

如果你要使用本正则式析取URL，请删除引号后面的引号。

If not , the regex continues searching for a match until it finally makes its way through the entire string .

如果不是这样的话，正则表达式就继续搜索匹配，直到穿越了整个字符串。

You have to include the character or characters between the words , otherwise the regex fails to find a match .

在单词之间必须包括这一（或这些）字符，否则该regex将无法找到匹配。