A large one: +? says "match the shortest set of one or more of these", (so, a+? matches "a" in "aaaaaaaa"), while * says "match 0 or more of these"; a* matches "bob".

See Quantifiers in Regular Expressions in the Tutorials section of this site, or read perldoc perlre on your system.

More generally, see How to RTFM for information about where things like this are documented on your system. 

perl -e 'print "How sweet does a rose smell? "; chomp $n = <STDIN>; $r
+ose = "smells sweet to degree $n"; *other_name = *rose; print "$other
+_name\n"'

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In reply to Re: Question on REGEX by arturo
in thread Question on REGEX by Jemts

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