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  1. or download this
        #!/usr/bin/perl -w
    use strict;
...
    &$symbolic;         # ack!
    &{$symbolic};       # ook!
    &{"foo"};           # eek!
  2. or download this
        use strict;
    sub foo {
...

    my $sref = \&{$bar};  # works!
    $sref->(1,2,3);       # foo: 1 2 3
  3. or download this
        use strict;
    my $foo = "this is foo";
    my $bar = "foo";
    my $ref = \${$bar};     # ack!