Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How to see the number of layers currently selected in QGIS. In algorithms for matrix multiplication (eg Strassen), why do we say n is equal to the number of rows and not the number of elements in both matrices? $url = 'http://spreadsheets.google.com/feeds/spreadsheets/p1 Are the models of infinitesimal analysis (philosophically) circular? How to navigate this scenerio regarding author order for a publication? This means that / is at the end of the input. We could use / as the delimiter in this command, Is this variant of Exact Path Length Problem easy or NP Complete, How to see the number of layers currently selected in QGIS. How do you use a variable in a regular expression? matches any character (except for line terminators) * matches the previous token between zero and unlimited times, as many Find centralized, trusted content and collaborate around the technologies you use most. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. "Replace all (//g) leading slash (^\/) or (|) trailing slash (\/$) with an empty string.". So the final regex might be: (dd300\/.+?,) The parentheses are only necessary when you need to access the matched string. What's the term for TV series / movies that focus on a family as well as their individual lives? How can I validate an email address using a regular expression? and then replaces them with a / Regex to remove only last slash in the URL. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Try regex101.com and enter I have a list of pathnames like this in a file: I want to delete all characters after the last occurrence of "/", No parens because it doesn't need any groups - result goes into group 0 (the match itself). I don't know if my step-son hates me, is scared of me, or likes me? Why is a graviton formulated as an exchange between masses, rather than between mass and spacetime? Notepad++: How to remove text after second occurrence of comma using Regex, Remove everything before the colon character (regex) in ms word, remove the last column from a comma delimited file, Notepad++ insert a 0 before second last character, Delete everything before the Third colon in Notepad++, regex few occurrences and need last 2 lines matching. AgainI wonder if this is faster than regex. How can we cool a computer connected on top of or within a human brain? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Would Marx consider salary workers to be members of the proleteriat? Regex match everything after question mark? Here's my original reply with the new character: $usr = 'Amer/kdb8916' $amer = $null if ($usr -match '\\ ( [^\\]+)$') { $amer = $matches[1] } $amer I tried, How to automatically classify a sentence or text based on its context? Is there a regular expression to detect a valid regular expression? Asking for help, clarification, or responding to other answers. For PHP, the closest function is strrchr which works like this: This includes the slash in the results - as per Teddy's comment below, you can remove the slash with substr: The data you want would then be the match of the first group. I figured I'd ask in case anyone knew off hand. This will not remove duplicate slashes at the beginning or end of the string ("//banking/bon/ita//") which a regex like replace(/^\/+|\/+$/g, '') will. 3 Answers. I believe this approach is probably easier to understand, after all regexes - in general - are hard to read: NorthWind.ac.uk/Users/Current/IT/Surname, FirstName has a path-like structure (windows It only takes a minute to sign up. Letter of recommendation contains wrong name of journal, how will this hurt my application? (i.e.,the entire contents of the line will be deleted, Much faster. If applied the regex to the example, it does the work fine, but the problem is when the URL does not have the last slash (it occur from time to time). Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I modified this to remove any number of leading or trailing slashes, by using "+": replace(/^\/+|\/+$/g, ''). Toggle some bits and get an actual square. WebRegular expressions are the default pattern engine in stringr. Replace Remove Trim, LTrim, RTrim TrimStart TrimEnd Regex.Replace I had prepared a workflow file with examples and Excel file with an explanation of how you can manipulate a part of string in variables. Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. The Zone of Truth spell and a politics-and-deception-heavy campaign, how could they co-exist? Find centralized, trusted content and collaborate around the technologies you use most. This may not be very useful for URIs, but may be useful for paths, in case your code needs to check/remove trailing slashes both on Windows and *NIX. How do you access the matched groups in a JavaScript regular expression? Could you observe air-drag on an ISS spacewalk? preg_match('([^/]+$)', ". I'm sure there's better ways to do things, than the ways I end up doing them. Why is water leaking from this hole under the sink? How many grandchildren does Joe Biden have? Wall shelves, hooks, other wall-mounted things, without drilling? @Sardine: You could try to benchmark it yourself and find out :-) I would consider it highly probable that this is faster than regex. What does and doesn't count as "mitigating" a time oracle's curse? Generally: /([^/]*)$ How do I create a Java string from the contents of a file? How write a regex that matches only when there's a slash OR nothing after the match? to match any number of trailing slashes, both / and \. Can I change which outlet on a circuit has the GFCI reset switch? Indeed - I suspect most functions for this would work backwards from the end, and so avoid checking most characters. Can I (an EU citizen) live in the US if I marry a US citizen? Asking for help, clarification, or responding to other answers. Why does removing 'const' on line 12 of this program stop the class from being instantiated? Wall shelves, hooks, other wall-mounted things, without drilling? Christian Science Monitor: a socially acceptable source among conservative Christians? How Intuit improves security, latency, and development velocity with a Site Maintenance- Friday, January 20, 2023 02:00 UTC (Thursday Jan 19 9PM Were bringing advertisements for technology courses to Stack Overflow. Also, you need to double up \ chars in strings as they are used for escaping special characters. Kyber and Dilithium explained to primary school students? Find a string of (zero or more) characters other than / . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Regex to remove everything before second to last forward slash, Microsoft Azure joins Collectives on Stack Overflow. Here's a solution that doesn't require regular expressions: Here's another solution that doesn't require regular expressions: Take a substring of your string starting at the beginning of the string and ending before the index of the last slash in your string: This solution doesn't use regexes. Which implementation language are we talking about? How to automatically classify a sentence or text based on its context? How can citizens assist at an aircraft crash site? Installing a new lighting circuit with the switch in a weird place-- is it correct? rev2023.1.18.43170. Regular expression for alphanumeric and underscores, Regular expression to match a line that doesn't contain a word. Of course, this also requires that backslashes be escaped. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How to translate the names of the Proto-Indo-European gods and goddesses into Latin? rev2023.1.17.43168. To learn more, see our tips on writing great answers. Two parallel diagonal lines on a Schengen passport stamp. Remove the last part $ asdf="xxx/xxxx/xxxxx/yyy" $ echo $ {asdf%/*} xxx/xxxx/xxxxx This is described in man bash: $ {parameter%word} $ {parameter%%word} How Intuit improves security, latency, and development velocity with a Site Maintenance- Friday, January 20, 2023 02:00 UTC (Thursday Jan 19 9PM Use of ChatGPT is now banned on Super User. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Can I (an EU citizen) live in the US if I marry a US citizen? There are a variety of ways to tinker or "improve" a regex. The following example identifies duplicate words in a string and uses the $+ substitution to replace them with a single occurrence of the word. Also, you need to double up \ chars in strings as they are used for escaping special characters. and the replacement string Making statements based on opinion; back them up with references or personal experience. and so would not make a substitution. \". How do I make the first letter of a string uppercase in JavaScript? Because '\' is the default path separator, we need to replace the '\' with '/' after doing this: Thanks for contributing an answer to Stack Overflow!