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what is "$$" for in Perl?

Allen Chan
Ranch Hand

Joined: Jun 07, 2002
Posts: 64
Hi all,
I know this is not the place, but what is "$$" for in perl, a line reads $str = "this" ."$$ADS{'name'}";
Maulin Vasavada
Ranch Hand

Joined: Nov 04, 2001
Posts: 1873
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,

the output was,

I agree. Here's the link: http://aspose.com/file-tools
subject: what is "$$" for in Perl?
jQuery in Action, 3rd edition