Regex to catch youtube traffic in a Mikrotik router

regcergtecrhcethgeargerer

Decompose polynomials of type +/- NUMBERx ^ NUMBER

finds the first bar (Find "bar" which has "bar" after it)

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...

Look ahead Positive(?=) Find expression A where expression B follows A(?=B) ...

Atomic Groups are non-capturing and once a match is made will exit the atomic group and throw away all backtracks. Use Atomic Groups for optimising performance. A non-atomic expression \b(foobar|foot|foo)\b and a test string of foots will: match foo of foobar => fail and backtrack to the 2nd alter...

This regexp is used in the SPIP cms for create tags fastly when you are writting a post.

Match lines with CR (Carriege Return) with no LF (Line Feed - New Line) or PG (Page Break) next to it.

It won't capture in the group.we can't back refrence A(?:nt|pple)\sA\1

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