Ds\Map::clear() function can remove all values.
public void Ds\Map::clear( void )
Ds\Map::clear() function doesn't have any parameters.
Ds\Map::clear() function doesn't return any value.
<?php $map = new \Ds\Map(["1" => "Tutorials", "2" => "Point", "3" => "India"]); $map->clear(); print_r($map); ?>