$o[] = array("id" => 1, "abc" => 1);
$o[] = array("id" => 2, "abc" => 3);
$o[] = array("id" => 3, "abc" => 2);
usort($o, create_function('$a,$b', sprintf('return ($a["abc"] > $b["abc"]) ? -1 : 1;')));
eq(2, $o[0]["id"]);
eq(3, $o[1]["id"]);
eq(1, $o[2]["id"]);
$objects = array();
$obj["id"] = 1;
$obj["abc"] = 1;
$objects[] = $obj;
$obj["id"] = 2;
$obj["abc"] = 3;
$objects[] = $obj;
$obj["id"] = 3;
$obj["abc"] = 2;
$objects[] = $obj;
eq(3, sizeof($objects));
$sort = \org\rhaco\lang\Sorter::hash($objects, "abc");
eq(3, sizeof($sort));
eq(1, $sort[0]["id"]);
eq(3, $sort[1]["id"]);
eq(2, $sort[2]["id"]);
eq(1, $objects[0]["id"]);
eq(2, $objects[1]["id"]);
eq(3, $objects[2]["id"]);
$sort = \org\rhaco\lang\Sorter::hash($objects, "-abc");
eq(3, sizeof($sort));
eq(2, $sort[0]["id"]);
eq(3, $sort[1]["id"]);
eq(1, $sort[2]["id"]);
