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Which regular expression standard is used in grep?
Fresh5 days ago
Mar 15, 20263666 viewsConfidence Score0%
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Problem
Is the regular expression standard used in grep POSIX + ASCII or something else is mixed in?
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Fix for: Which regular expression standard is used in grep?
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That all depends on which flags you pass to grep. The normal flagless grep (which is the same as passing -G) uses "Basic regular expressions": If you specify -E it uses "Extended" regular expressions: And then you have -P for Perl regular expression…
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