$ perl -Mstrict -wE 'my $str = "[]"; say $str == "[]" ? 1 : 0'
Argument "[]" isn't numeric in numeric eq (==) at -e line 1.
Argument "[]" isn't numeric in numeric eq (==) at -e line 1.
1

##</code><code>##

$ perl -Mstrict -wE 'my $str = "42"; say $str == "[]" ? 1 : 0'
Argument "[]" isn't numeric in numeric eq (==) at -e line 1.
0