what is "$$" for in Perl?

[Allen Chan]

Hi all,
I know this is not the place, but what is "$$" for in perl, a line reads $str = "this" ."$$ADS{'name'}";
Thanks.

[Maulin Vasavada]

hi Allan,
$varname is a value of variable with 'varname' right?
so $$varname is kind of pointer to a pointer thing in C you know..
first it will get value for $varname then it will apply another $ on that value which would mean value of a variable with name "value of varname"..
here is simple program i ran,

#!/bin/perl
$temp1="maulin ";
$temp2="temp1";
print "$$temp2\n";

the output was,
maulin

regards
maulin.