Regex (or regexp) is known as regular expression matching of patterns, strings or characters in, for example, a large text file. Questions should be tagged as such whatever the programming language involved and the tag can also apply to command-line or graphical programs that have regex plugins or ...

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header_checks in Postfix

I attempted to write a regex for header_checks to filter out To: header, but it is not working. The assumption is: if a header To: does not contain local domain names it will reject the message. ...
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How can I use C++11's <regex> on Ubuntu?

I normally use the G++ compiler, but I don't have anything against using clang++. Reading about this, I get the idea that G++'s implementation of C++11's regex might not compile, and if it does, it ...