"foo\nbar" =~ /foo$/ or print "Didn't match EOL :-(\n";

##</code><code>##

    ^ begin
    $ end (before \n)

##</code><code>##

    ^ start of str
    $ end of str (incl \n)

##</code><code>##

    /m ^ = SOL, $ = EOL
    /s . matches \n too