query: How to identify a regular expression
positive_passages.docid: 2559
positive_passages.text: Is there a regular expression to detect a valid regular expression?
negative_passages.docid: 130919
negative_passages.text: Regular expression for letters, numbers and - _
negative_passages.docid: 7336
negative_passages.text: What is the best regular expression to check if a string is a valid URL?
negative_passages.docid: 113601
negative_passages.text: What is the difference between .*? and .* regular expressions?
negative_passages.docid: 46974
negative_passages.text: What's the meaning of a number after a backslash in a regular expression?
negative_passages.docid: 84913
negative_passages.text: How to "inverse match" with regex?
negative_passages.docid: 121821
negative_passages.text: Commenting Regular Expressions
negative_passages.docid: 47836
negative_passages.text: Regular expression for recognizing url
negative_passages.docid: 1177
negative_passages.text: Regular expression to match a line that doesn't contain a word
negative_passages.docid: 2360
negative_passages.text: My regex is matching too much. How do I make it stop?
negative_passages.docid: 101140
negative_passages.text: How can I find all matches to a regular expression in Python?
negative_passages.docid: 114438
negative_passages.text: Explanation of Lookaheads in This Regular Expression
negative_passages.docid: 91206
negative_passages.text: Regexp recognition of email address hard?
negative_passages.docid: 8669
negative_passages.text: Regular Expression for password validation
negative_passages.docid: 15680
negative_passages.text: jQuery selector regular expressions
negative_passages.docid: 101148
negative_passages.text: Regular expression to return text between parenthesis
negative_passages.docid: 2319
negative_passages.text: How to validate an email address using a regular expression?