Perhaps you could turn the array containing a flat list of ids and names into an AoH and use grep to pull out the odd ids when building it.

knoppix@Microknoppix:~$ perl -MData::Dumper -E '
> @studentInfo = qw{
>    001 John
>    002 Mary
>    003 Tom
>    };
> @oddStudents =
>    map  { { id => $_->[ 0 ], name => $_->[ 1 ] } }
>    grep { $_->[ 0 ] % 2 }
>    sub  {
>       push @ret, [ shift, shift ] while @_;
>       return @ret;
>       }->( @studentInfo );
> say Data::Dumper->Dumpxs(
>    [ \ @oddStudents ],
>    [ qw{ *oddStudents } ]
>    );'
@oddStudents = (
                 {
                   'name' => 'John',
                   'id' => '001'
                 },
                 {
                   'name' => 'Tom',
                   'id' => '003'
                 }
               );

knoppix@Microknoppix:~$

[download]

I hope this is helpful.

Cheers,

JohnGG

In reply to Re: Find odd/even elements of array by johngg
in thread Find odd/even elements of array by perlPractioner

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