Re: something about hash

[Shawn H Corey]

On 12-02-13 11:41 AM, lina wrote:

sub display_hash
{
        my (%hash) = @_;
        foreach (%hash)
        {
                print "$_ =>  $hash{$_}\n";
        }
}

display_hash('name' =>  'Mar', 'distance' =>  'forget');

distance =>  forget
Use of uninitialized value in concatenation (.) or string at
./subroutines_examples.pl line 38.
forget =>
name =>  Mar
Use of uninitialized value in concatenation (.) or string at
./subroutines_examples.pl line 38.
Mar =>

Thanks ahead for any suggestion,

    foreach my $key ( keys %hash ){
        print "$key => $hash{$key}\n";
    }

See `perldoc -f keys`

Also, you should always use a my variable for the foreach variable.


--
Just my 0.00000002 million dollars worth,
  Shawn

Programming is as much about organization and communication
as it is about coding.

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