In verbose mode, whitespace is ignored everywhere, including within character classes. To insert whitespace, use its escaped form or a hex literal. For example, \ or \x20 for an ASCII space.Note Flags can be toggled within a pattern. For example, the following syntax uses a case-insensitive...
Aspects: \h and \v are shorthands for horizontal and vertical whitespace; \H and \V are the negated versions. Aspects: \K to “keep” the match so far from the overall match result. Aspects: \N matches any character except \n regardless of the “single line” mode modifier. Aspects:...
To match any character, use the dot"."pattern. To match a single character (or multiple characters) zero or more times, use".*"pattern. To match multiple characters or a given set of characters, use the character classes. 1. Match Any Character By default, the'.'dot character in a re...
If a regular expression pattern includes either the number sign (#) or literal white-space characters, they must be escaped if input text is parsed with the RegexOptions.IgnorePatternWhitespace option enabled. While the Escape method escapes the opening bracket ([) and opening brace ({) ch...
Converts any escaped characters in the input string. C#Copy publicstaticstringUnescape(stringstr); Parameters str String The input string containing the text to convert. Returns String A string of characters with any escaped characters converted to their unescaped form. ...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = "(-)"; string input = "apple-apricot-plum-pear-pomegranate-pineapple-peach"; // Split on hyphens from 15th character on Regex regex = new Regex(pattern); // Split on ...
extended. Literal whitespace characters are ignored, except in character sets. 例如: 正则表达式/b qt/可以匹配字符串b qt(正常模式) 正则表达式/b qt/x不能匹配字符串b qt(忽略空白字符) 正则表达式/b\ qt/x可以匹配字符串b qt(转义字符) 正则表达式/b\sqt/x可以匹配字符串b qt(字符类) ...
`S/DOTALL` "." matches any character at all, including the newline. `X/VERBOSE` Ignore whitespace and comments for nicer looking RE's. `U/UNICODE` Make \w, \W, \b, \B, dependent on the Unicode locale. 6.2,match 方法 re.match尝试从字符串的起始位置开始匹配: ...
\w- matches any word character (negation:\W) \s- matches any whitespace character (negation:\S) \d- matches any decimal digit (negation:\D) \z- matches end of string (negation:\Z) \p{name}- matches characters from the given unicode category, e.g.\p{P}for punctuation characters (su...
change the character classes\d\sand\wto match the same characters as RE2. NOTE: if you also use theECMAScriptoption then this will change the\scharacter class to match ECMAScript instead of RE2. ECMAScript allows more whitespace characters in\sthan RE2 (but still fewer than the the defaul...