drupul compound hook_field_is_empty() function

gistfile1.aw

<?php
/**
 * Implements hook_field_is_empty().
 */
function FOO_contact_field_is_empty($item, $field) {
  unset($item['_weight']);
  $null = array_filter($item, 'isempty');
  return empty($null);
}

function isempty($var) {
  return empty($var);
}