for ( my $indx = 0; $indx <=2; $indx++){

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That is usually written as: 

    for my $indx ( 0 .. 2 ) {

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        # Make a reference to the hash reference 
         my $work_package = \%{$work_request};

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You have a hash reference in $work_request which you then dereference as %{$work_request} and then get a reference to the original hash with \%{$work_request}.   You can accomplish the same thing more simply with: 

         my $work_package = $work_request;

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            my @list = @{$work_package->{$key}};
            for (my $a_id=0; $a_id <= $#list; $a_id++) {
                $list[$a_id]=$indx;
                print " $list[$a_id]\t";
            }
            print "\n";

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You are copying the contents of @{$work_package->{$key}} to @list so any changes to the contents of @list will disapear when the loop ends.   The for loop is usually written as: 

            for my $a_id ( 0 .. $#list ) {
                $list[$a_id]=$indx;
                print " $list[$a_id]\t";
            }

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In reply to Re: Array of dynamic Hash how to preserve the values by jwkrahn
in thread Array of dynamic Hash how to preserve the values by ckandreou

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