This feature is specific for JavaScript lone closing brackets are allowed in other languages. However, as it has a special meaning in Java Strings, you have to use a double backslash. The following characters are reserved in. Lone closing brackets ] and } are allowed by default, but if you use the 'u' flag, then you must escape them: In common regular expression this is done by a backslash. Net string removing traces of offending characters that could prevent compiling. In JavaScript, you also need to escape the slash / in regular expression literals: Alternatively, you can escape the caret: JavaScript For example: means "any character except vowels", while means "any vowel or a caret". An escape sequence begins with a backslash character (), which indicates that the character(s) that follow should be treated in a special way. If you need to include the caret ^ into a character class, it cannot be the first character otherwise, it will be interpreted as any character except the specified ones. If you are just trying to match anything at the end of the string, then you probably want. If you need to include the dash into a character class, you can make it the first or the last character instead of escaping it. The meta character must modify some other match pattern. Inside character classes, you must escape the following characters:įor example, to find an opening or a closing bracket, use ]. If you want to use any of these as literal characters you can escape special characters with to give them their literal character meaning. If you want to find the backslash itself, double it: \\. For example, to find the text $100, use \$100. If you want to find one of these metacharacters literally, please add \ before it. In most regular expression engines (PCRE, JavaScript, Python, Go, and Java), these special characters must be escaped outside of character classes: Which special characters must be escaped in regular expressions?
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