/**
* This method unsubscribes a listener.
*
* @access public
* @static
* @param IHashMap\Type $xs the left operand
* @param ITuple\Type $entry a tuple containing the key and listener
* @return IHashMap\Type the map
*/
public static function unsubscribe(IHashMap\Type $xs, ITuple\Type $entry) : IHashMap\Type
{
$k = $entry->first();
if ($xs->__hasKey($k)) {
$ys = ILinkedList\Module::delete($xs->item($k), $entry->second());
$zs = IHashMap\Module::putEntry($xs, ITuple\Type::box2($k, $ys));
return $zs;
}
return $xs;
}
/**
* This method applies each item in this hash set to the subroutine function.
*
* @access public
* @static
* @param IHashMap\Type $xs the hash map
* @param callable $subroutine the subroutine function to be used
* @return IHashMap\Type the hash map
*/
public static function map(IHashMap\Type $xs, callable $subroutine) : IHashMap\Type
{
$zs = IHashMap\Type::empty_();
$xi = IHashMap\Module::iterator($xs);
$i = IInt32\Type::zero();
foreach ($xi as $k => $v) {
$entry = ITuple\Type::box2($k, $v);
$zs = IHashMap\Module::putEntry($zs, $subroutine($entry, $i));
$i = IInt32\Module::increment($i);
}
return $zs;
}
