Hello,   I am trying to write a regex to match just with B2 and B3   String content = "aaaaaB1aaaaaXaaaaaB2aaaaaB3aaaaZaaaB4aaaa";   String regex = "(B[\\d]{1}?);    //this group matches with all B1, B2, B3 and B4  I would need to delimit the matching between the 'X' and the ...

I'm trying to create a regex that searches 4 lines after a specific term to make sure it exactly matches the four lines after another specific term. For instance it would search a text for "animals list 1" and take note of the following 4 lines and then search for "animals list 2" and determine if it has the next 4 ...

Hi! I need a regexp that does the following: For example we're having a string "abcmnbcxyz"   I need to build a regexp that will find everythig that goes before "z" but not containing "bc" I was trying to use lookups like that one: "(?<!bc).*?z" but it matches whole string. positive ...

I have a requirement where I have to fetch prefix in a text excluding right hand side digit pattern. For ex: AB9T0005 should give me only AB9T AB9T-K1A-0005 should give me only AB9T-K1A- What I mean is prefix may include any input including numbers and other alpha numeric values. With out using regular expression I will parse from right ...

Hello, I am using C# in Visual Studio 2008.  I have a text file of the entire Bible that I am wanting to either put into a database or write to an XML document.  The format of the text is as follows with comments in C# single line comment style to the right of the actual text (example: Genesis  //book ...

Hello there, I am using PHP, preg_match to pull out of various Auction titles for video games, the video game platform of those games.  I have a list of valid ones and trying to match back to them.  However as this is completely user entered data there is a enormous amount of variety in the titles, which leads to some interesting ...

mycotics, may I kindly point out to you post number 29450 in the thread I mentioned? if (preg_match('/^(?=.*bill)(?=.*bob)/', $string)) {     echo "Oh, look! Bill and Bob are finally here! Let's have a party!"; } will do what you want. 

docdawson:  ^(\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*){n,20}$ Doesn't this just match n to 20 e-mail addresses? I understand carlosaml wants addresses with no more than 20 characters. The shortest possible address that will match the pattern above has 5 characters (a@b.c). To check for 5 to 20 characters one would have to use a ...

Try something along the lines of ^(?!something).*$ Edit: Lyndar was first. Don't forget to escape the user supplied input string. Pattern.quote(String s) will put start and end of line assertions around the string though.

Just use something like: ^From:[^<]+<(?!user1@example\.com)(?!user2@example\.org)(?!user3@example\.net).*?^X-Spam-Level:\s*(\S*) with singleline (s) and multiline (m) modifiers (so the dot matches newlines and ^ matches the beginning of each line).