[10] perl -Mwarnings /tmp/testit.pl
"my" variable @perlbooks masks earlier declaration in same scope at /tmp/testit.pl line 50.
Bareword "parent" not allowed while "strict subs" in use at /tmp/testit.pl line 15.
syntax error at /tmp/testit.pl line 34, near ")
        return"
Global symbol "@hrefs" requires explicit package name at /tmp/testit.pl line 34.
Execution of /tmp/testit.pl aborted due to compilation errors.