Top "Negative-lookahead" questions

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

Regular expression negative lookahead

In my home directory I have a folder drupal-6.14 that contains the Drupal platform. From this directory I use the …

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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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String negation using regular expressions

Is it possible to do string negation in regular expressions? I need to match all strings that do not contain …

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Javascript regular expression: match anything up until something (if there it exists)

Hi I am new to regular expression and this may be a very easy question (hopefully). I am trying to …

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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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Positive/Negative lookahead with grep and perl

my login.txt file contains following entries abc def abc 123 def abc abc de tha ewe when i do the …

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Need a regex to match a variable length string of numbers that can't be all zeros

I need to validate an input on a form. I'm expecting the input to be a number between 1 to 19 digits. …

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Negative look ahead python regex

I would like to regex match a sequence of bytes when the string '02 d0' does not occur at …

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How to use Negative Lookahead in Regex to Delete unwanted Lines

I need help regarding using negative lookahead. I am using Notepad++ and I want to delete all lines except the …

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POSIX Regular Expressions: Excluding a word in an expression?

I am trying to create a regular expression using POSIX (Extended) Regular Expressions that I can use in my C …

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