The => is just a grandified comma interpreting its left side as a string, so in your question it is the same as fun( '-url', $httpRefer ). So no hash involved yet unless the called function creates one. See these two examples: 

use strict;
use warnings;
use Data::Dumper;

sub fun1 { print Dumper \@_; }
sub fun2 { my %args = @_; print Dumper \%args }

my $httpRefer = 'someValue';
fun1( -url => $httpRefer ); 
fun2( -url => $httpRefer ); 

__END__
$VAR1 = [
          '-url',
          'someValue'
        ];
$VAR1 = {
          '-url' => 'someValue'
        };

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In reply to Re: What does the dash before hash assignment means? by hdb
in thread What does the dash before hash assignment means? by anaconda_wly

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