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• Date validation in PHP

  - by Rachel

  What would the regex expression that would go into preg_split function to validate date in the format of 7-Mar-10 or how can I validate a date of format 7-Mar-10 in PHP Thanks.

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• regex find content question

  - by jeff

  Trying to use regex refind tag to find the content within the brackets in this example using coldfusion joe smith <[email protected]> The resulting text should be [email protected] Not having any luck. Any suggestions?

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• preg_match_all image source

  - by David

  I have the following regex expression which is to extract the source of any img tag in HTML. /(<img).*(src\s*=\s*"([a-zA-Z0-9\.;:\/\?&=\-_|\r|\n]{1,})")/isxmU However, it doesn't appear to be matching the following: <IMG SRC='http://www.mysite.com/pix/lens/mtf/CAEF8512L.gif'> How can I build it to match this as well?

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• PHP preg_replace html comments with empty space

  - by phpmatt

  Hi Guys, I have a bit of php code like this: $test = "<!--my comment goes here--> Hello World"; Now i want to strip the whole html comment from the string, i know i need to use preg_replace, but now sure on the regex to go in there. Can anybody help? Thanks

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• .Net Regular Expression

  - by xzerox

  Alright so I want to grab the information on a website thats between [usernames] and [/usernames] I know how to get the string but how would I use regex to only have the information in the middle. Remember I am going to be having more then one thing on the page.

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• Match everything except for specified strings

  - by Alfred

  I know that the following regex will match "red", "green", or "blue". red|green|blue Is there a straightforward way of making it match everything except several specified strings?

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• Regular Expression problem

  - by Yatendra Goel

  I want a regex to find the following types of strings: http://anything.abc.tld http://anything.abc.tld/ where abc - abc always remains abc anything - it could be any string tld - it could be any tld (top-level-domain) like .com .net .co.in .co.uk etc. Note: The url must not contain any other thing at the end, means http://anything.abc.tld/xyz is not acceptable.

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• How to check if a character is a non-word boundary

  - by michael

  In Java regular expression, it has "\B" as a non-word boundary. http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Pattern.html If I have a 'char', how can I check it is a non-word boundary? Thank you.

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• Find a regular expression that matches a string?

  - by Mirai

  I need a model for finding all of the regular expressions that would match a particular string. Basically, I need an algorithm for doing what I do to generate a regex search string from some pattern. My purpose for this to create a list of potential regular expressions from a selection of text and order that list from least specific (i.e. string of characters with abitrary length) to most specific (i.e. the string itself) to be used in text editor.

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• Check for a valid domain name in a string?

  - by demos

  I am using python and would like a simple api or regex to check for a domain name's validity. By validity I am the syntactical validity and not whether the domain name actually exists on the Internet or not.

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• How to split this string in c#?

  - by melaos

  hi i'm really not used to the split string method in c# and i was wondering how come there's no split by more than one char function? and my attempt to try to split this string below using regex has just ended up in frustration. anybody can help me? basically i want to split the string below down to aa**aa**bb**dd^__^a2a**a2a**b2b**dd^__^ into aa**aa**bb**dd a2a**a2a**b2b**dd and then later into aa aa bb dd a2a a2a b2b dd thanks!

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• Regex.IsMatch vs string.Contains

  - by Pradeep

  Is there any difference in speed/memory usage for these two equivalent expressions: Regex.IsMatch(Message, "1000") Vs Message.Contains("1000") Any situations where one is better than other ?

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• Hot to remove text from variable? (php)

  - by Glister

  I have a variable $link_item, it's used with echo and gives the strings like <span class="name">Google</span>http://google.com How to remove "<span class="name">Google</span>" from string? It should give just "http://google.com". Heard it can be done with regex(), please help.

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• C#: What's the best way to delete empty lines from a multiline string?

  - by swisstony

  In C# what's the best way to remove blank lines i.e., lines that contain only whitespace from a string? I'm happy to use a Regex if that's the best solution.

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• Regular expression to extract text between two sets of characters (Javascript)

  - by optician

  I would like to extract some text between two points in a string, in Javascript Say the string is "start-extractThis-234" The numbers at the end can be any number, but the hyphens are always present. Ideally I think capturing between the two hypens should be ok. I would like the result of the regex to be extractThis

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• PHP preg_match to get function-like string

  - by pistacchio

  Hi to all, if I have a string like 'foo(bar)', with the following code i can almost parse it the way i want: $results = array(); preg_match( "/\w*(?=(\(.*\))?)/", 'foo(bar)', &$results ); print_r($results); /* Array ( [0] => foo [1] => (bar) ) */ How can I modify the regex to have bar instead of (bar)? Thanks

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• What is the efficient way to find email addresses in a big text?

  - by salman

  I want to extract email addresses from a large text file. what is the best way to do it? My idea is to find '@' in the text and use Regex to find email address into substring at (for example) 256 chars before this position and length of 512.

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• Insert commas in a number for formatting

  - by gameover

  I need a way to convert a number into formatted way by inserting comma at suitable places. Can it be done using regex? Example: 12345 => 12,345 1234567 =>1,234,567

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• ASP.Net - validating email address with regexp?

  - by ElHaix

  When validating an email address with the regex validation component, an additional RequiredFieldValidator must be added to ensure there is a value present. I've mostly taken care of this with a CustomFieldValidator, and taking care of this with Javascript. Is there a better way of doing this?

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• Split a string by two characters

  - by David

  Hi, Firstable i want to match if a string has the following format: $abc #xyz or $abc .xyz. The abc and xyz mean only alphanumeric string. If it's matched then i need to extract the first $abc and the last #xyz, all that using pure javascript and maybe regex. The pattern is in the following order: Dollar Sign Unlimited alphanumeric string space a hash or point Unlimited alphanumeric string Thanks in advance for any help.

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• replacing a path with sed

  - by compie

  How can I use sed to replace this line char * path_list_[1] = { "/some/random/path" }; with this line char * path_list_[2] = { "lib/foo", "lib/bar" }; in a file named source.c Notes: * The path is really random. * Your solution should only change this line in source.c * I'm only interested in a sed oneliner. You can use this Python regex as a starting point: text = re.sub('static const char \* path_list_\[1\] = \{ "[^"]*" \};', 'static const char * path_list_[2] = { "lib/sun", "lib/matlab" };', text)

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• Ruby equivalent to "grep -C 5" to get context of lines around the match?

  - by wonderfulthunk

  I've searched for this a bit but I must be using the wrong terms - does ruby have a way to grep for a string/regex and also return the surrounding 5 lines (above and below)? I know I could just call "grep -C 5 ..."or even write my own method, but it seems like something ruby would have and I'm just not using the right search terms.

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• How to extract product weight from this HTML

  - by Blankman

  My HTML looks like this: <td class="main"><b>Product Weight (2.83 lbs in 1 container)</b></td> I need to get the value 2.83 from the HTML. Need help with the regex. I have this: Pattern p = Pattern.compile( "<td\\sclass=\"main\"><b>Product\\sWeight\\s\\s((?:\\d+\\.)?\\d+ \\w{3})"); But doesn't seem to be working. Am I missing an escape or something?

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• C#: How to replace "-" with " -" only when it's not preceded by "e"?

  - by MaDDoX

  I imagine I should use Regex for that but I still scratch my head a lot about it (and the only similar question I found wasn't exactly my case) so I decided to ask for help. This is the input and expected output: Input: "c-0.68219,-0.0478 -1.01455-0.0441 0.2321e-4,0.43212" Output:"c -0.68219,-0.0478 -1.01455 -0.0441 0.2321e-4,0.43212" Basically I need either commas or spaces as value separators, but I can't break the exponential index (e-4). Maybe do two successive replacements?

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• How to replace the string based on an expression

  - by deepak

  I'm having a string where i'm using some placeholders to replace it with some values based on an object. It is like the following: Hello User <#= UserName #> I need to replace the <#= UserName # with a value. How can this be done with a regex? Please help. I dont want a string replace solution. There are somany placeholders and hardcoding the <#= UserName # and replace with the value is pointless

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