Understanding strange Perl multiline comment mechanism
问题 EDIT: Note to new Perl programmers : This mechanism should NOT be used for multiline comments! It has a flaw decreases readability. In this PerlMonks post on mechanisms to produce multiline comments in Perl, Abigail provided this one, that perplexes me: The problem with just using a here document is that it will issue a warning under '-w'. It's much better to use the little known << >> operator. <<q=~q>>; This is a multiline comment. q Running it through -M0=Deparse gives: " This is a