Top "Regex-lookarounds" questions

Regular expression lookarounds are zero-width assertions that verify conditions about the context of a match at the current match position.

Regex to get the words after matching string

Below is the content: Subject: Security ID: S-1-5-21-3368353891-1012177287-890106238-22451 Account Name: ChamaraKer Account Domain: JIC …

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Regex Until But Not Including

For regex what is the syntax for search until but not including? Kinda like: Haystack: The quick red fox jumped …

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RegEx - Exclude Matched Patterns

I have the below patterns to be excluded. make it cheaper make it cheapere makeitcheaper.com.au makeitcheaper making it …

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Regex lookahead for 'not followed by' in grep

I am attempting to grep for all instances of Ui\. not followed by Line or even just the letter L …

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Negative lookahead Regular Expression

I want to match all strings ending in ".htm" unless it ends in "foo.htm". I'm generally decent with regular …

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Regex only capture first match

I want to parse a string using regex, example of the string is Lot: He said: Thou shalt not pass! …

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Select the next line after match regex

I'm currently using a scanning software "Drivve Image" to extract certain information from each paper. This software enables certain Regex …

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What's wrong with my lookahead regex in GNU sed?

This is what I'm doing (simplified example): gsed -i -E 's/^(?!foo)(.*)$/bar\1/' file.txt I'm trying to put …

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Java regex: Negative lookahead

I'm trying to craft two regular expressions that will match URIs. These URIs are of the format: /foo/someVariableData and /…

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Perl Regex "Not" (negative lookahead)

I'm not terribly certain what the correct wording for this type of regex would be, but basically what I'm trying …

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