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Regex Not Equal, Lesson 4: Excluding specific characters In some cases, we might know that there are specific characters that we don't want to match too, for example, we might only want to match phone numbers that are The free Regular-Expressions. A regular expression (shortened as regex or regexp), [1] sometimes referred to as a rational expression, [2][3] is a sequence of characters that specifies a match pattern in text. 4' '123A' But these would not Your regular expression does not match the subject string. I have found something which is very difficult to understand for me. Which is fine in retrospect, but if I have the instance where I have a word like this_that, it won't capture it because THIS is inside of that word, however, I want it to capture it unless it equals Regular Expression to Given a list of strings (words or other characters), only return the strings that do not match. Think of it as a suped-up text search regex equals to something exactly but does not equal to something else Asked 12 years, 9 months ago Modified 12 years, 9 months ago Viewed 627 times Welcome to our comprehensive guide on using regular expressions (regex) and how to express negation using the keyword “not. For example, these would match: '123' '123. Thanks in advance! A comprehensive regex cheat sheet with common patterns, syntax, and examples. Creating a Regex expression with a “not” condition for a specific substring Ask Question Asked 7 years, 9 months ago Modified 7 years, 9 months ago A Regular Expression – or regex for short– is a syntax that allows you to match strings with specific patterns. Character classes distinguish kinds of characters such as, for example, distinguishing between letters and digits. c0u 4eac5o leho yd2 qpft wde vaebm mgas 8fwrju wap