what is the meaning for $::sql->hash ($

Vaish has asked for the wisdom of the Perl Monks concerning the following question:

Hi,
My code is not getting executed when it reaches the following statements. Can anyone please explain me what actually these code represent ?

subr
{
# This printimage returns the following 3 values
#username: qwe$err
#password: vva**1
#statements:
#

$::sql->printImage () if $::opt_debug;
@::output = $::sql->hash ($_[0]);
}
can you please explain me what does this sql->hash will try to do ?
Thanks in Advance
Vaish

Comment on what is the meaning for $::sql->hash ($_[0]); ?

Replies are listed 'Best First'.
Re: what is the meaning for $::sql->hash ($_[0]); ? by Fletch (Bishop) on Jul 03, 2008 at 12:43 UTC
It's calling the method `hash` on the variable `$sql` in the `main` package passing the first argument the sub was given. `$Foo::bar` means to access the scalar variable `$bar` in the symbol table of package `Foo`; if the package name is omitted it's the same as if you'd specified `$main` (so your example is really just `$main::sql->hash( $_[0] )`). This is all covered in perlmod in the first few paragraphs (well the :: and package symbol table stuff is at least). The cake is a lie. The cake is a lie. The cake is a lie.	[reply] [d/l] [select]
Re^2: what is the meaning for $::sql->hash ($_[0]); ? by Vaish (Initiate) on Jul 07, 2008 at 09:08 UTC
Thanks Fletch. I will go through the perlmod	[reply]
Re: what is the meaning for $::sql->hash ($_[0]); ? by oko1 (Deacon) on Jul 03, 2008 at 14:29 UTC
Your code will not run because there's no Perl function called 'subr'. Please don't post "fake" code without denoting that you're doing so. -- Human history becomes more and more a race between education and catastrophe. -- HG Wells	[reply]
Re^2: what is the meaning for $::sql->hash ($_[0]); ? by Vaish (Initiate) on Jul 07, 2008 at 09:12 UTC
Okol, That is not a fake code. It should have happened when I copied my code there . It should be sub r1 which meant as first subroutine. The main reason for posting the code was that I didn't understand the meaning what and how the sql->hash function will work and store in output variable.	[reply]