Regular expressions (often shortened to "regex") are a declarative language used for pattern matching within strings. Please also include a tag specifying the programming language or tool you are using.

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A regex to match Strings contained after “:”

I need to use scan.useDelimiter() to recognize Strings taking place after ":". I am making a Scanner that takes the following line from a list of similar entries. c : 20002 : The Dragon : ...
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Apostrophe as part of a word with regexp in MATLAB

I am working on something in MATLAB that processes text. For this I need my regular expression to work properly. So far I have this regexp below, which works for almost everything, but I would like ...
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Break down text file in bash

I have a text file in the following format: variableStep chrom=chr1 span=10 10161 1 10171 1 10181 2 10191 2 10201 2 10211 2 10221 2 10231 2 10241 2 10251 1 variableStep ...
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perl regexp with sas - exact match one or the other

I need to extract numbers written in words or in figures in a text. I have a table that looks like that, 1 ... 1 child ... 2 ... three children ... 3 ...four children ... 4 ...2 children... ...
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R grepl to find a pure number

Probably a very basic question but its buggging me that i can't easily find a solution...so i thought i should come to the wisdom of the SO wise ones... I would like to be able to return a TRUE or ...
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Javascript regex to match last word regardless of specials characters

We use this script to alter the last word in a sentence. $div = $('.cPageHeader h2'); $div.html($div.text().replace(/(\w+?)$/, '<span class="cOrange">$1</span>')); This works well as ...
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8answers
2k views

Best Strategies for preventing addresses with PO Boxes?

I have a client which is shipping via UPS, and therefore cannot deliver to Post Office boxes. I would like to be able to validate customer address fields in order to prevent them from entering ...
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8 views

Issues with using Custom iterators for regex_iterator

I want to do regex search on a text where I want to skip certain characters from the text. Original question asked here : Regular Expression library that maintains state, takes input character by ...
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1answer
24 views

preg_replace doesn't accept unicode

I'm trying to maintain only valid characters and Hebrew Unicode characters from a string using preg_replace. I'm getting an error on this string: $PLAINText1 = ...
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Using match to find substrings in strings with only bash

Although I am almost sure this has been covered, I can't seem to find anything specific to this. As I continue my journey on learning bash I keep finding parts where I am baffled as to why things ...
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2answers
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How to Specify single quote in regular expression

Here is my regular expression . I want to include single quotes (') within the characters such as (O'Neal Nickel). Here is my regular expression allowing letters and spaces and full stops(.) and (-) ...
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get specific string after first occurance of string regex sublime text 2 find & replace

include_once($pathToRoot.'header.php'); echo('</div>'); assume you have variations on the above code across hundreds of files, how do you match against the first occurrence of </div> ...
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Regex to check if a single quote is preceeded by another single quote

I would like to write a regex to validate if a single quote is preceeded by another single quote. Valid strings: azerty''uiop aze''rty''uiop ''azertyuiop azerty''uiop'' azerty ''uiop'' ...
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boost regex smatch in recursive function behaves like a static variable

I encountered a strange behavior using boost::regex. The following function calls itself once (if invoked with argument 'true'). void regex_rek(bool recurse) { boost::smatch match; if ( recurse ...
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Python: check if any word in a list of words matches any pattern in a list of regular expression patterns

I have a long list of words and regular expression patterns in a .txt file, which I read in like this: with open(fileName, "r") as f1: pattern_list = f1.read().split('\n') for illustration, the ...

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