Re^2: Trouble passing hash into function

That's what I thought would work but here is what's happening:

sub test_parser {    
    
    use Data::Dumper;
    #print Dumper(@_);
        
    my %test = @_;
    
    print Dumper(%test);

}
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If I comment out the second print and uncomment the first print, the @_ dumps fine. When I try to set %test, I get this error:

Reference found where even-sized list expected at Debugger.pm line 8.
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I'm sending the hash from a master .pl file into the function like this:

Debugger::test_parser(\%competitors_master);
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What else could be wrong?

Thanks,

Doug

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Re^3: Trouble passing hash into function by GrandFather (Saint) on Sep 05, 2007 at 23:13 UTC
You are passing a hash reference, not a hash (which gets flattened into a list). The first dump works as expected because it sees a list containing one element which is the reference to the hash you passed in. The `my %test = @_;` and generates an error because @_ contains only one element - the reference to the hash. Instead you should `my $test = shift;` and work with the reference. DWIM is Perl's answer to Gödel	[reply] [d/l] [select]

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Re^3: Trouble passing hash into function
by GrandFather (Saint) on Sep 05, 2007 at 23:13 UTC

You are passing a hash reference, not a hash (which gets flattened into a list).

The first dump works as expected because it sees a list containing one element which is the reference to the hash you passed in.

The my %test = @_; and generates an error because @_ contains only one element - the reference to the hash. Instead you should my $test = shift; and work with the reference.

DWIM is Perl's answer to Gödel

[reply]
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[select]