Any single character . Alternate - match either a or b a|b Any whitespace character \s Any non-whitespace character \S Any digit \d Any non-digit \D Any word character \w Any non-word character \W Non-capturing group (?:...) ...
A character in the range: a-z or A-Z [a-zA-Z] Any single character . Alternate - match either a or b a|b Any whitespace character \s Any non-whitespace character \S Any digit \d Any non-digit \D Any word character \w Any non-word character \W Match everything enclosed (?:....
或者显式地引用与Character.isWhitespace相同的逻辑,这并不完全相同: 如果要严格应用Character.isWhitespace的逻辑,可以使用 匹配所有字符 string.codePoints().allMatch(Character::isWhitespace) string.matches("\\p{javaWhitespace}+") string.isBlank() (JDK11) 的 在至少有一个空白字符 string.codePoints(...
as the end of the string. `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...
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) ...
The * symbol can be used with the meta character . to match any string of characters .*. The * symbol can be used with the whitespace character \s to match a string of whitespace characters. For example, the expression \s*cat\s* means: zero or more spaces, followed by a lowercase ...
\s matches a whitespace character — that is, a space or tab From what mentioned above, we can write regular expressions like this: \w{5} matches any five-letter word or a five-digit number. a{5} will match “aaaaa”. \d{11} matches an 11-digit number such as a phone number. ...
To ignore all unescaped white space characters and comments (denoted by the un-escaped hash#character and the next new-line character) in the pattern, include thesoption in theoptionsfield: // Specify xin the optionsfield {$regexMatch:{input:"$description",regex:/line/,options:"x"} } ...
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...
The*symbol can be used with the meta character.to match any string of characters.*. The*symbol can be used with the whitespace character\sto match a string of whitespace characters. For example, the expression\s*cat\s*means: zero or more spaces, followed by lowercase characterc, followed ...