This feature is specific for JavaScript lone closing brackets are allowed in other languages. Lone closing brackets ] and } are allowed by default, but if you use the 'u' flag, then you must escape them: In JavaScript, you also need to escape the slash / in regular expression literals: However, as it has a special meaning in Java Strings, you have to use a double backslash. Alternatively, you can escape the caret: JavaScript In common regular expression this is done by a backslash. Is there any method in Java or any open source library for escaping (not quoting) a special character (meta-character), in order to use it as a regular expression This would be very handy in dynamically building a regular expression, without having to manually escape each individual character. For example: means "any character except vowels", while means "any vowel or a caret". 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. As more than one filter can be combined, I deactived the smart search and had to active the regEx-search instead. 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. Inside character classes, you must escape the following characters:įor example, to find an opening or a closing bracket, use ]. If you want to find the backslash itself, double it: \\. Hey all, in this RegEx tutorial I'll introduce you to some more special characters which exhibit very diferent behaviours when placed in a. 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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