It does "equals" and "contains" which always the objects to be searched in a list. It is a hash, but more complex behaviour can be created depending on the value object.

Another example:

my $person = tbd_name::Object->new();
my $person->set( "AGE", ::Integer->new(30) );

my $people = tbd_name::List->new();
$people->add( $person );

my $age_range = tbd_name::Object->new();
my $range->set( "AGE", ::Range->new( 19,39 ) );

my $search_result = tbd_name::List->new();

$people->search($age_range, $search_result);
[download]

At this point I'm trying to figure out a good name for it.

So you need a speacial type to hold an integer. And another to hold two integers; And another in order to return a list.

I think you want Java.

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Wasn't logged in... $search_result will contain the $person object. Or if there were many $person objects $search_result would hold anything that matches. The search can be based on any number of keys.