query: Regex works perfectly for hashtags and @usernames but not for URL's
positive_passages.docid: 7336
positive_passages.text: What is the best regular expression to check if a string is a valid URL?
negative_passages.docid: 22174
negative_passages.text: URL regex passed by regex buddy but failed by Dart
negative_passages.docid: 60913
negative_passages.text: Problem with digits in URLs when using mathspec and hyperref
negative_passages.docid: 33567
negative_passages.text: Why "?v=hash" is added to my URLs?
negative_passages.docid: 32137
negative_passages.text: Regex doesn't work in String.matches()
negative_passages.docid: 9141
negative_passages.text: Why does my regular expression work in X but not in Y?
negative_passages.docid: 52449
negative_passages.text: Java RegEx meta character (.) and ordinary dot?
negative_passages.docid: 18555
negative_passages.text: How can I use wget to get files recursively if the username contains an @?
negative_passages.docid: 41880
negative_passages.text: regular expression: Find url from anchor tag
negative_passages.docid: 68860
negative_passages.text: Why this javascript regex doesn't work?
negative_passages.docid: 27647
negative_passages.text: How to check whether a string is a valid HTTP URL?
negative_passages.docid: 39419
negative_passages.text: RegEx expression to find a href links and add NoFollow to them
negative_passages.docid: 111925
negative_passages.text: What's the difference between !, %, and @ in replacement tokens?
negative_passages.docid: 94194
negative_passages.text: URLs: Dash vs. Underscore
negative_passages.docid: 153133
negative_passages.text: Get HTML page  values and names using regex on PHP
negative_passages.docid: 25962
negative_passages.text: Are user names that represent domains allowed?
negative_passages.docid: 141693
negative_passages.text: Why is this match pattern unreachable when using non-literal patterns?