I have URL like  https://some-domain/auth/authenticate?auth=1c4cf948-0867-488d-8596&amp;client_id=account&amp;tab_id=0p-SoVza1Sw  I want to get the value of tab_id by using regex.  I have done it through JS but I want a regEx to return 0p-SoVza1Sw.  I tried this /tab_id=([^&amp;]+)&amp;*/g but it matches with tab word also  I know it would be easy but am not good at regex, Thank you
8109
I want to match a portion of a string using a  and then access that parenthesized substring:  var myString = "something format_abc"; // I want "abc"  var arr = /(?:^|\s)format_(.*?)(?:\s|$)/.exec(myString);  console.log(arr);     // Prints: [" format_abc", "abc"] .. so far so good. console.log(arr[1]);  // Prints: undefined  (???) console.log(arr[0]);  // Prints: format_undefined (!!!)   What am I doing wrong?    I've discovered that there was nothing wrong with the regular expression code above: the actual string which I was testing against was this:  "date format_%A"   Reporting that "%A" is undefined seems a very strange behaviour, but it is not directly related to this question, so I've opened a new one, .    The issue was that console.log takes its parameters like a printf statement, and since the string I was logging ("%A") had a special value, it was trying to find the value of the next parameter.
3542
I have a value like this:  "Foo Bar" "Another Value" something else   What regex will return the values enclosed in the quotation marks (e.g. Foo Bar and Another Value)?
47023
Say I have the string "User Name:firstname.surname" contained in a larger string how can I use a regular expression to just get the firstname.surname part?  Every method i have tried returns the string "User Name:firstname.surname" then I have to do a string replace on "User Name:" to an empty string.  Could back references be of use here?  Edit:  The longer string could contain "Account Name: firstname.surname" hence why I want to match the "User Name:" part of the string aswell to just get that value.
19883
How do I get the substring " It's big \"problem  " using a regular expression?  s = ' function(){  return " It\'s big \"problem  ";  }';
5698
Getting the subdomain from a URL sounds easy at first.  http://www.domain.example   Scan for the first period then return whatever came after the "http://" ...  Then you remember  http://super.duper.domain.example   Oh. So then you think, okay, find the last period, go back a word and get everything before!   Then you remember  http://super.duper.domain.co.uk   And you're back to square one. Anyone have any great ideas besides storing a list of all TLDs?
33951
Im trying to craft a regex that only returns &lt;link&gt; tag hrefs  Why does this regex return all hrefs including &lt;a hrefs?       (?&lt;=&lt;link\s+.*?)href\s*=\s*[\'\"][^\'\"]+        &lt;link rel="stylesheet" rev="stylesheet"      href="idlecore-tidied.css?T_2_5_0_228" media="screen">     &lt;a href="anotherurl">Slash Boxes&lt;/a>   thank you
30489
I have a Python regular expression that contains a group which can occur zero or many times - but when I retrieve the list of groups afterwards, only the last one is present. Example:  re.search("(\w)*", "abcdefg").groups()  this returns the list ('g',)  I need it to return ('a','b','c','d','e','f','g',)  Is that possible? How can I do it?
59657
Regex.IsMatch( "foo", "[\U00010000-\U0010FFFF]" )    Throws: System.ArgumentException: parsing "[-]" - [x-y] range in reverse order.  Looking at the hex values for \U00010000 and \U0010FFF I get: 0xd800 0xdc00 for the  first character and 0xdbff 0xdfff for the second.  So I guess I have really have one problem. Why are the Unicode characters formed with \U split into two chars in the string?
3554
If I had a URL such as  http://localhost/search.php?year=2008   How would I write a JavaScript function to grab the variable year and see if it contains anything?  I know it can be done with location.search but I can’t figure out how it grabs parameters.
94801
I have the following C# which simply replaces parts of the input string that look like EQUIP:19d005 into URLs, like this:  input = Regex.Replace(input, @"(EQUIP:)(\S+)", @"&lt;a title=""View equipment item $2"" href=""/EquipmentDisplay.asp?eqnum=$2""&gt;$1$2&lt;/a&gt;", RegexOptions.IgnoreCase);   The HTML ends up looking like this.  &lt;a title="View equipment item 19d005" href="/EquipmentDisplay.asp?eqnum=19d005"&gt;EQUIP:19d005&lt;/a&gt;   The only trouble is that the destination page expects the eqnum querystring to be all UPPERCASE so it returns the correct equipment when eqnum=19D005 but fails if it receives eqnum=19d005.  I guess I can modify and correct EquipmentDisplay.asp's errant requirement of uppercase values however, if possible I'd like to make the C# code comply with the existing classic ASP page by uppercasing the $2 in the Regex.Replace statement above.  Ideally, I'd like the HTML returned to look like this:  &lt;a title="View equipment item 19d005" href="/EquipmentDisplay.asp?eqnum=19D005"&gt;EQUIP:19d005&lt;/a&gt;   Notice although the original string was EQUIP:19d005 (lowercase), only the eqnum= value is uppercased.  Can it be done and if so, what's the tidiest way to do it?
37476
What is the easiest way to match non-ASCII characters in a regex? I would like to match all words individually in an input string, but the language may not be English, so I will need to match things like ü, ö, ß, and ñ. Also, this is in Javascript/jQuery, so any solution will need to apply to that.
33382
Can a regular expression match whitespace or the start of a string?  I'm trying to replace currency the abbreviation GBP with a £ symbol. I could just match anything starting GBP, but I'd like to be a bit more conservative, and look for certain delimiters around it.  &gt;&gt;&gt; import re &gt;&gt;&gt; text = u'GBP 5 Off when you spend GBP75.00'  &gt;&gt;&gt; re.sub(ur'GBP([\W\d])', ur'£\g&lt;1&gt;', text) # matches GBP with any prefix u'\xa3 5 Off when you spend \xa375.00'  &gt;&gt;&gt; re.sub(ur'^GBP([\W\d])', ur'£\g&lt;1&gt;', text) # matches at start only u'\xa3 5 Off when you spend GBP75.00'  &gt;&gt;&gt; re.sub(ur'(\W)GBP([\W\d])', ur'\g&lt;1&gt;£\g&lt;2&gt;', text) # matches whitespace prefix only u'GBP 5 Off when you spend \xa375.00'   Can I do both of the latter examples at the same time?
113533
I'm trying to write a regex that will parse out the directory and filename of a fully qualified path using matching groups.  so...  /var/log/xyz/10032008.log   would recognize group 1 to be "/var/log/xyz" and group 2 to be "10032008.log"  Seems simple but I can't get the matching groups to work for the life of me.  NOTE:  As pointed out by some of the respondents this is probably not a good use of regular expressions.  Generally I'd prefer to use the file API of the language I was using.  What I'm actually trying to do is a little more complicated than this but would have been much more difficult to explain, so I chose a domain that everyone would be familiar with in order to most succinctly describe the root problem.
4355
For example, this regex  (.*)&lt;FooBar&gt;   will match:  abcde&lt;FooBar&gt;   But how do I get it to match across multiple lines?  abcde fghij&lt;FooBar&gt;
12909
I'm using RegexBuddy but I'm in trouble anyway with this thing :\  I'm processing line by line a file. I built a "line model" to match what I want.  Now i'd like to do an inverse match... i.e. I want to match lines where there is a string of 6 letters, but only if these six letters are not Andrea, how should I do that?    EDIT: I'll write the program that uses this regex, I don't know yet if in python or php, I'm doing this thing first to learn some regex :) There are different types of line, I wanted to use regex to select the type i'm interested in. Once I got these lines I've to apply an other filter just to do not match a known value, I need all the others, not that. The (?!not-wanted) is working pretty fine, thank you. :-)  I hope this clarifies the question :)
34708
In SharePoint how do you get the ID value from the url of the page you are on using javascript( Jquery,ajax, Rest..),  e.g. I have the url like so: http:// ddd/mypage?ID=xx   I tried before to retrieve the full url but it didn't get the ID and its value. so I have to get the ID value directly with the get method
54866
I want to grab the value of a hidden input field in HTML.  &lt;input type="hidden" name="fooId" value="12-3456789-1111111111" /&gt;   I want to write a regular expression in Python that will return the value of fooId, given that I know the line in the HTML follows the format  &lt;input type="hidden" name="fooId" value="**[id is here]**" /&gt;   Can someone provide an example in Python to parse the HTML for the value?