hello, everyone. I'm programming a user registration. However, I found a charactor limiting to 'username' from sample codes, such as just '.', ''', '-' are accepted, no space or other blank, etc. Are those restrictions necessary? I'm using MySQL+PHP. If I adopt the following several ways: change the collation of the column to '...
When testing an answer for another user's question I found something I don't understand. The problem was to replace all literal \t \n \r characters from a string with a single space. Now, the first pattern I tried was: /(?:\\[trn])+/ which surprisingly didn't work. I tried the same pattern in Perl and it worked fine. After some trial...
Basically I'm trying to get a bit of regex to do the following... I have some data I need to split, the sample data looks like this: Brand Name - Product Name Another Brand - Shoe Laces Heinz - Bakes Beans I want to be able to select the brand name or the product name but I can't seem to do it without catching the " - " part in the re...
Hi, I have a control that will return some html to me as a string. Before putting that on screen, I'd like to be able to tell if it'll just show as empty. For example the control might return <p><br /></p>, which when I test using C# for string.Emtpy obviously it's not - but nothing gets displayed on screen. Is there a regex function ...
I wonder if there is an easy and efficient way in SQL Server 2005 to eliminate replicated characters in a string. Like converting 'ABBBCDEEFFFFG' to 'ABCDEFG' It really sucks that SQL Server has such a poor string library and no ready-to-use regexp feature... ...
I have the following regular expression: (?=.{8,})[a-zA-Z]+[^a-zA-Z]+|[^a-zA-Z]+[a-zA-Z]+ I do not understand the "?=" part of it. My basic (incorrect) understanding is that it is saying a string that is 8 characters or more long, which has one or more letters followed by one or more non-letters, or one or more non-letters followe...
In my LaTeX files, I have literally thousands of occurrences of the following construct: $\displaystyle{...math goes here...}$ I'd like to replace these with \mymath{...math goes here...} Note that the $'s disappear, but the curly braces remain---if not for the trailing $, this would be a basic find-and-replace. If only I knew any...
I am trying to merge two .net regular expressions into one. The following expressions are validating excel like cell names. Regex.IsMatch(name, @"^[A-Za-z]{1}[\w\.]*$") && !Regex.IsMatch(name, @"^[A-Za-z]{1,2}\d+$"); The first part ensures the cell name starts with a character and can be any length. The second ensures the cell na...
Hi I want to retrieve via regexp javascript figures 1 - preceded by either: And | or nothing 2 - followed by either: Nothing And | or I thought of using lookbehind but it seems that javascript does not support lookbehind thank you for helping me ...
Ok so I doing the following regex replace: Input: ([Ll])ocation Output: \1abel That replaces Location with Label and location with label. However, if I want to replace location with geocode and Location with Geocode, can I do that with a single regex? I'm doing a search and replace in notepad++ at the moment, but I've had this probl...
I'm trying to find all of the quoted text on a single line. Example: "Some Text", and "Some more Text" and "Even more text about \"this text\"" I need to get: "Some Text" "Some more Text" "Even more text about \"this text\"" \"[^\"\r]*\" gives me everything except for the last one, because of the escaped quotes. I have read abo...
I'm still relatively new to regex. I'm trying to find the shortest string of text that matches a particular pattern, but am having trouble if the shortest pattern is a substring of a larger match. For example: import re string = "A|B|A|B|C|D|E|F|G" my_pattern = 'a.*?b.*?c' my_regex = re.compile(my_pattern, re.DOTALL|re.IGNORECASE) matc...
Hi, Can somebody help me to get a content between [%= and %]. ...
First time sed'er, so be gentle. I have the following text file, 'test_file': <Tag1>not </Tag1><Tag2>working</Tag2> I want to extract the text in between <Tag2> using sed regex, there may be other occurrences of <Tag2> and I would like to extract those also. So far I have this sed based regex: cat test_file | grep -i "Tag2"| sed '...
Hello! I'm just wondering if there is a way (maybe with REGEX) to validate that an input on a java desktop app is exactly an string formated as: "YYYY-MM-DD". I've search but with no success. Thank you ...
By reading the documentation here it seems to me that re.compile(r'^[-\w]+$') would just search whether there was any character that is alphanumeric, an underscore, or a hyphen. But really this returns a match only if all the characters fit that description (ie, it fails if there is a space or a dollar sign or asterisk, etc). I don't...
There are multiple posts on here that capture value, but I'm just looking to check to see if the value is something. More vaguely put; I'm looking to understand the difference between checking a value, and "capturing" a value. In the current case the value would be the following acceptable money formats: Here is a post that explains som...
Here's what I currently have, but it only works if the decimal is preceded and followed by a decimal. ^\$?(\d*?(?<=\d)\.?(?=\d)\d*?)$ So the string: '$50.00' matches, but '$.50', and '$50.' don't match (I want them to) I want to retrieve the matched decimal like '50.00' in a single group if possible so that I can grab the normalized ...
I want a regex that will generate a match when it encounters "integer xyz" but only returns 'xyz' as the matching text. 'xyz' can be an identifier (letters+digits+underscore). xyz by itself generates no match, only xyz preceded by 'integer ' thanks! ...
i need to ignore anything that is one space, and empty space at least bigger than one space should be matched... "MARY HAD A LITTLE LAMB" i expect "MARY", "HAD A LITTLE", "LAMB" ...