What metacharacter that matches any non whitespace character?
\S metacharacter
The \S metacharacter matches non-whitespace characters.
What is a non whitespace character?
A non-space character is any character that is not a whitespace character.
What is the regex for matching with all characters which are * Non white space *?
\s
\s matches any whitespace character [ \r\n\t\f ] . \S matches any non-white space character. Here, denotes whitespace characters, and denotes non-white space characters.
What are whitespace characters in regex?
The most common forms of whitespace you will use with regular expressions are the space (␣), the tab (\t), the new line (\n) and the carriage return (\r) (useful in Windows environments), and these special characters match each of their respective whitespaces.
What is white space character in regex?
\s stands for “whitespace character”. Again, which characters this actually includes, depends on the regex flavor. In all flavors discussed in this tutorial, it includes [ \t\r\n\f]. That is: \s matches a space, a tab, a carriage return, a line feed, or a form feed.
What is a non word character in regex?
Non-word characters include characters other than alphanumeric characters ( – , – and – ) and underscore (_). Task. You have a test string . Your task is to match the pattern.
What is regex used for?
A regular expression (or “regex”) is a search pattern used for matching one or more characters within a string. It can match specific characters, wildcards, and ranges of characters.
How to Regex character?
– To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \\ ). – You also need to use regex \\\\ to match “\\” (back-slash). – Regex recognizes common escape sequences such as \ for newline, \ for tab, \\r for carriage-return, \ nn for a up to 3-digit octal number, \ for a two-digit hex code,
What does this Perl regex mean?
Perl Regular Expression Summary: in this tutorial, you are going to learn about Perl regular expression, the most powerful feature of the Perl programming language. A regular expression is a pattern that provides a flexible and concise means to match the string of text. A regular expression is also referred to as regex or regexp.
What is s in regex?
The regular expression \\s is a predefined character class . It indicates a single whitespace character. Let’s review the set of whitespace characters: [ \\ \\\f\\r] The plus sign + is a greedy quantifier, which means one or more times. For example, expression X+ matches one or more X characters.