Re: Remove similar key=value pair from HOH

[pme]

Hi vaibhav07,

Perl hash unable to store duplicated keys. See and run the code snippet below.

use Data::Dumper;

my %hash =(
          'script' => 'foo.pm',
          'params' => {
                             'err' => '99',
                             'FILE' => 'fileA'
                       },
          'par_global' => {
                                'err' => '99',  # this value (99) is o
+verwritten
                                'err' => '20',  # with (20)
                                'FILE_READ' => 'fileB',
                           },
           'testset' => ['test1']
        );

print Dumper( \%hash ) . "\n";

[Laurent_R]

Hmm, not convinced.

$ perl -e 'use Data::Dumper;
>
> my %hash =(
>           'script' => 'foo.pm',
>           'params' => {
>                              'err' => '99',
>                              'FILE' => 'fileA'
>                        },
>           'par_global' => {
>                                 'err' => '99',  # this value (99) is
+ overwritten
>                                 'err' => '20',  # with (20)
>                                 'FILE_READ' => 'fileB',
>                            },
>            'testset' => ['test1']
>         );
>
> print Dumper( \%hash ) . "\n";'
$VAR1 = {
          'params' => {
                        'FILE' => 'fileA',
                        'err' => 99
                      },
          'script' => 'foopm',
          'par_global' => {
                            'FILE_READ' => 'fileB',
                            'err' => 20
                          },
          'testset' => [
                         'test1'
                       ]
        };

[LanX]

What's the problem?

[AnomalousMonk]

What's the problem?

The expression  'script' => 'foo.pm' is rendered in the  Dumper output as "'script' => 'foopm'", which is puzzling (although I cannot reproduce this ;-)

[vaibhav07]

bash-4.2$ cat dump
use Data::Dumper;

my %hash =(
          'script' => 'foo.pm',
          'params' => {
                             'err' => '99',
                             'FILE' => 'fileA'
                       },
          'par_global' => {
                                'err' => '99',  
                                'FILE_READ' => 'fileB',
                           },
           'testset' => ['test1']
        );

print Dumper( \%hash ) . "\n";

 
bash-4.2$ perl dump
$VAR1 = {
          'params' => {
                        'FILE' => 'fileA',
                        'err' => '99'
                      },
          'script' => 'foo.pm',
          'par_global' => {
                            'FILE_READ' => 'fileB',
                            'err' => '99'
                          },
          'testset' => [
                         'test1'
                       ]
        };

My question is while traversing the hash if'err' => '99' is mentioned again, it should just avoid it.