Regex Tester & Validator
Test, validate and match regular expressions
Test, validate and match regular expressions
Matches the retweet marker 'RT' followed by either the start of the string or a whitespace character, then an @ symbol and a username made of word characters. Commonly used to detect or filter retweeted messages in tweet text, such as 'RT @username'. Note that in JavaScript, \A is treated as a literal 'A' rather than a start-of-string anchor, so the pattern effectively matches 'RTA@user' or 'RT @user'.