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Re: Add value from one array element into another of same ID

by BillKSmith (Monsignor)
on May 27, 2021 at 17:27 UTC ( #11133150=note: print w/replies, xml ) Need Help??


in reply to Add value from one array element into another of same ID

You need nested loops. The outer loop selects the data that you want to keep. The inner loop updates the CODE if a matching ID is found.
use strict; use warnings; use Data::Dumper; my $test_data = [ {'ID' => '1212', 'Name' => 'JOE' , 'Number' => 'XY1', 'CODE' => +'6',}, {'ID' => '1212', 'Name' => '' , 'Number' => 'XY1', 'CODE' => ' +10',}, {'ID' => '4456', 'Name' => 'MARIA', 'Number' => 'TYX', 'CODE' => +'6',}, {'ID' => '4456', 'Name' => '' , 'Number' => 'TYX', 'CODE' => ' +10',}, {'ID' => '8765', 'Name' => 'JEAN' , 'Number' => 'HPO', 'CODE' => +'6',}, ]; my @result; foreach my $data ( @{ $test_data } ) { next if !$data->{Name}; my $id = $data->{ID}; push @result, $data; foreach my $temp ( @{ $test_data } ) { if (!$temp->{Name} and ($temp->{ID} eq $id)) { $result[-1]->{CODE} = $temp->{CODE}; last; } } } print Dumper(\@result);

OUTPUT

$VAR1 = [ { 'ID' => '1212', 'CODE' => '10', 'Number' => 'XY 'Name' => 'JOE' }, { 'ID' => '4456', 'Name' => 'MARI 'Number' => 'TY 'CODE' => '10' }, { 'CODE' => '6', 'Number' => 'HP 'Name' => 'JEAN 'ID' => '8765' } ];
Bill

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Re^2: Add value from one array element into another of same ID
by Anonymous Monk on May 27, 2021 at 19:44 UTC
    I think your code is doing something in reverse, noticed that I need to keep the values in the node where CODE => 10. But if I change the value in "Number" and run the code, it gets overwritten from the value in the node with "6":
    use strict; use warnings; use Data::Dumper; my $test_data = [ {'ID' => '1212', 'Name' => 'JOE' , 'Number' => 'XY1', 'CODE' => +'6',}, {'ID' => '1212', 'Name' => '' , 'Number' => 'WW3', 'CODE' => ' +10',}, {'ID' => '4456', 'Name' => 'MARIA', 'Number' => 'TYX', 'CODE' => +'6',}, {'ID' => '4456', 'Name' => '' , 'Number' => 'TYX', 'CODE' => ' +10',}, {'ID' => '8765', 'Name' => 'JEAN' , 'Number' => 'HPO', 'CODE' => +'6',}, ]; my @result; foreach my $data ( @{ $test_data } ) { next if !$data->{Name}; my $id = $data->{ID}; push @result, $data; foreach my $temp ( @{ $test_data } ) { if (!$temp->{Name} and ($temp->{ID} eq $id)) { $result[-1]->{CODE} = $temp->{CODE}; last; } } } print Dumper(\@result);

    When it should be like this after running the code:
    {'ID' => '1212', 'Name' => 'JOE' , 'Number' => 'WW3', 'CODE' => ' +10',},
      You can fix this problem by adding one line.
      ... $result[-1]->{CODE} = $temp->{CODE}; $result[-1]->{Number} = $temp->{Number}; ...

      I thought that I understood your requirements, but now I am not sure. I now think that you want one output record for each ID. For each ID, the input should contain one named record and possible one unnamed one. Output for any other input would be undefined. We probably cannot make any assumptions about record order. In the single record case, we output that record. In the two record case, we output the unnamed record with the value of its name field replaced with the name from the other record.

      Bill

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