metacharacters

metacharacters

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• 網絡元字符；元字符集；正則表達式元字符集

例句

A number of metacharacters require special treatment when trying to match them.

許多元字符要求在試圖匹配它們時特別對待。

The metacharacters described in the following table do not cause the engine to advance through the string or consume characters.

下表中描述的元字符不會使引擎在字符串中前進或使用字符。

The word boundary metacharacters ensure that only whole words are detected.

字邊界元字符確保只檢測整個單詞。

A few characters are used in patterns as metacharacters to indicate repetition, grouping, or positioning.

幾個字符模式中使用的元字符顯示重復，分組，或定位。

Here's a complete list of the metacharacters; their meanings will be discussed in the rest of this HOWTO.

這里有一個元字符的完整列表；其含義會在本指南余下部分進行討論。

Explains the concept of escaping characters and how to create a regular expression that matches metacharacters.

說明轉義符的概念以及如何創建與元字符匹配的正則表達式。

The set of metacharacters gives regular expressions their processing power.

元字符使正則表達式具有處理能力。

Explains the characters that comprise a regular expression, the characters that comprise metacharacters, and the behavior of metacharacters.

說明構成正則表達式的字符、構成元字符的字符以及元字符的行為。

Ordinary characters consist of all printable and non-printable characters that are not explicitly designated as metacharacters.

普通字符包括沒有顯式指定為元字符的所有可打印和不可打印字符。

Regular expressions are built from characters and operators, augmented by metacharacters.

正則表達式通過元字符加強的字符和操作符構建。

Small expressions are combined by using a variety of metacharacters and operators to create larger expressions.

也就是，使用各種中繼字元及運算子結合小型運算式來建立較大的運算式。

There are two types of characters that are used in regular expressions: metacharacters and normal characters.

正則表達式中使用以下兩種類型的字符：元字符和常規字符。

Setting up crontab entries requires a string with escaped shell metacharacters, so it is best done with simple commands and parameters.

設置crontab條目需要一個包含轉義的shell元字符的字符串，所以適合于簡單的命令和參數。

The following table describes the metacharacters that affect matching.

下表描述了影響匹配的元字符。

Metacharacters are not active inside classes.

元字符在類別里并不起作用。

A string of characters with any metacharacters converted to their escaped form.

包含任何已轉換為轉義形式的元字符的字符串。

There are some metacharacters that we haven't covered yet. Most of them will be covered in this section.

還有一些我們還沒展示的元字符，其中的大部分將在本節展示。

It's also used to escape all the metacharacters so you can still match them in patterns;

它也可以用于取消所有的元字符，這樣你就可以在模式中匹配它們了。

The following table contains the complete list of metacharacters and their behavior in the context of regular expressions

下表包含了元字符的完整列表以及它們在正則表達式上下文中的行為

You can override the capture by using the non-capturing metacharacters? : ,

可以通過使用非捕獲元字符？：、？