use v5.10.0;
use warnings;
@records=('nil','one','two');
$records= 50;

say $records[1];
#prints the string one
say $$records;
# error, because $records doesn't point anywhere
say $$records[0];
#still error, because $records doesn't point anywhere
#you are not accessing @records here at all

$records= \@records;
#now $records is a reference to the array @records, but we could have
#used a different variable name as well, for example $x
say $$records[1];
#prints 'one', because $records points to @records

$records= \$records[1];
say $$records;
#prints 'one', because $records points to $records[1]

$a= \$records[1]; $b= \$records[2];
#this is how sort prepares the variables $a and $b if it wants to comp
+are those two records
say $$a,$$b;
#prints 'onetwo'
[download]