Useful Regular Expression Tutorial
Hi I'm looking for a good tutorial on using regular expressions especially with grep. I tried googling for some but most tutorials are too basic and cover things I already know. ...
regex
Match an end html tag if start tag is not present
i want to get an ending html tag like </EM> only if somewhere before it i.e. before any previous tags or text there is no starting <EM> tag my sample string is ddd d<STRONG>dfdsdsd dsdsddd<EM>ss</EM>r and</EM>and strong</STRONG> in this string the output should be </EM> and this also the second </EM> because it lacks the starting <EM...
Regular Expression puzzle
In (Visual Basic, .NET): Dim result As Match = Regex.Match(aStr, aMatchStr) If result.Success Then Dim result0 As String = result.Groups(0).Value Dim result1 As String = result.Groups(1).Value End If with: aStr equal to (whitespace is normal space and there is 7 spaces between "n" and "(" ): "AMEVDIEERPK + 7 Oxidat...
regex matching alpha character followed by 4 alphanumerics.
Ok, I need a regex for the following pattern: -Total of 5 characters (alpha and numeric, nothing else). -first character must be a letter (A,B,C only) -the remaining 4 characters can be number or letter. clarifcation: the first letter can only be A,B, or C. Example: A1234 is valid but D1234 is invalid. ...
Negate Regex in MySQL rlike Expression
I want to match any line that does not end with 'CA' or 'CA[any number]'. How can I do that using rlike in MySQL? (Note it doesn't support ?! etc). Here's the regex for a positive match, I just need a way to negate it: '^.*[C][A][0-9]?$' (Due to an embarrassing architecture limitation, I don't want to use not rlike ...) ...
Parsing XML with REGEX in Java
Given the below XML snippet I need to get a list of name/value pairs for each child under DataElements. XPath or an XML parser cannot be used for reasons beyond my control so I am using regex. <?xml version="1.0"?> <StandardDataObject xmlns="myns"> <DataElements> <EmpStatus>2.0</EmpStatus> <Expenditure>95465.00</Expenditure> ...
PHP Regex - Change to an URL regex for a dash match
I have used the following regex to get the urls from text (e.g. this is text http://url.com/blabla possibly some more text). '@(https?://([-\w\.]+)+(:\d+)?(/([\w/_\.]*(\?\S+)?)?)?)@' This works for all URLs but I just found out it doesn't work for URLs shortened like: "blabla bla http://ff.im/-bEnA blabla" turns becomes http://ff.im/ a...
'undefined' matches in AS3 RegExp? huh?
I've got a long regex in AS3 / Flex which finds one of a couple dozen words. The Regex looks like: word|wordup|wordly|wordster when I do "wordup wordster!".match(regex) I'm getting undefined maches! the match array that's returned has matches: [0] 'wordup' [1] undefined array length: 2 Is there a known bug in AS3's grouping ma...
Regex expression to split string into items
Hi, I've got text in a form of [1/12/2008 2:32:11 p.m. - name] line 1 [1/12/2008 2:36:00 p.m. - name] - PRIVATE line 2 [some text] sd [1/12/2008 2:36:00 p.m. - name] line 3 which i want to split into items so i have access to time, name and text of each item, e.g.: (item 1) 1: 1/12/2008 2:32:11 p.m. 2: name 3: line 1 (item 2)...
Regular Expression for alphanumeric and underscores
I would like to have a regular expression that checks if a string contains only upper and lowercase letters, numbers, and underscores. ...
preg_replace is replacing $ signs
I have the following piece of code which replaces "template markers" such as %POST_TITLE% with the contents of a variable called $post_title. function replaceTags( $template, $newtext ) { $template = preg_replace( '/%MYTAG%/', $newtext, $template ); return $template; } The issue is that when $post_full has a '$' in it, the ret...
Efficient grep method to match two atoms?
I'm looking for a method to grep for multiple atoms e.g. "foo" and "bar". I'm aware i can use grep 'foo' file | grep 'bar' to get both of them but i was wondering if there was a more efficient way. Any googleing seems to only throw results for an 'or' based search rather than 'and'. ...
Looking for a regular expression to identify hard coded magic numbers in source code
A frequent issue in code reviews is whether a numeric value should be hard-coded in the code or not. Does anyone know of a nice regular expression that can catch 'magic numbers' in code like: int overDue = 30; Money fee = new Money(5.25D); without also getting a ton of false positives like for loop initialization code? for (int i = 0...
Regex - replace only last part of an expression
I'm attempting to find the best methodology for finding a specific pattern and then replace the ending portion of the pattern. Here is a quick example (in C#): //Find any year value starting with a bracket or underscore string patternToFind = "[[_]2007"; Regex yearFind = new Regex(patternToFind); //I want to change any of these va...
Regexp: Remove quotation marks from json list
I've got an array of objects in json format: [{"name":"obj1", "list":["elem1", "elem2", "elem3"]}, {"name":"obj2", "list":["elem4", "elem5", "elem6"]}] Now I'd like to construct regexp to remove quotation marks from around elements in the "list" using javascript. Desirable result: [{"name":"obj1", "list":[elem1, elem2, elem3]}, {"name"...
[.NET || RegEx] Remove single backslashes, convert doubles to single in string.
Hi all, How best can I convert instances of double backslashes to a single backslash in a string, but remove any occurrences of single backslash? So this: \|Testing|ABC:1234\\1000-1\| Should convert to this: |Testing|ABC:1234\1000-1| Ideally I want to avoid a temporary replace of '\' to another character. A solution using .NET...
Split SQL statements blocks using Regular expression in C#
Can we write an regular expression such that it splits the stored procedure in multiple SQL statements. It should split update, delete select etc statements. ...
Does RegularExpressionValidator use other flavor than Regex?
I want to do preliminary check if entered string looks like Vehicle Identification Number (VIN). I know what it consists of 17 letters and digits, but letters I, O and Q are not allowed inside VIN, so I use this regular expression: ^[0-9A-Z-[IOQ]]{17}$ Now if I check a string like 1G1FP22PXS2100001 with RegularExpressionValidator it f...
How do I strptime from a pattern like this?
Hi, I need to use a datetime.strptime on the text which looks like follows. "Some Random text of undetermined length Jan 28, 1986" how do i do this? ...
What is the perfect Regex for doing wiki formatting (.Net)?
H guys, I've got this wiki formatting algorithm which I am using at Stacked to create HTML out of "wiki syntax" and I am not really sure if the current one I am using is good enough, optimal or contains bugs since I am not really a "Regex Guru". Here is what I am currently using; // Body is wiki content... string tmp = Body.Replace("&",...