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Home/ Questions/Q 8914
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Alek Richter
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Alek RichterEnlightened
Asked: January 11, 20222022-01-11T09:57:35+00:00 2022-01-11T09:57:35+00:00

Regex not operator

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Is there an NOT operator in Regexes? Like in that string : "(2001) (asdf) (dasd1123_asd 21.01.2011 zqge)(dzqge) name (20019)"

I want to delete all \([0-9a-zA-z _\.\-:]*\) but not the one where it is a year: (2001).

So what the regex should return must be: (2001) name.

NOTE: something like \((?![\d]){4}[0-9a-zA-z _\.\-:]*\) does not work for me (the (20019) somehow also matches…)

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  1. Alek Richter Enlightened
    2022-01-11T09:57:53+00:00Added an answer on January 11, 2022 at 9:57 am

    Not quite, although generally you can usually use some workaround on one of the forms

    [^abc], which is character by character not a or b or c,
    or negative lookahead: a(?!b), which is a not followed by b
    or negative lookbehind: (?<!a)b, which is b not preceeded by a

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