my $bar = "$  foo and $cake";

##</code><code>##

my $bar = "$ $total_foo_dollars";

##</code><code>##

my $foo = ['a', 'b', 'c'];
my $bar = "$   foo -> [2]";

##</code><code>##

my $foo = ['a', 'b', 'c'];
my $bar = "$foo->[2]";