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toSet

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Returns a Set based on the values of the current Map

public function toSet(): Set<Tv>;

Returns​

  • Set<Tv> - a Set with the current values of the current Map.

Examples​

This example shows that converting a Map to a Set also removes duplicate values:

// This Map contains repetitions of the hex codes for 'red' and 'blue'
$m = Map {
  'red' => '#ff0000',
  'also red' => '#ff0000',
  'green' => '#00ff00',
  'another red' => '#ff0000',
  'blue' => '#0000ff',
  'another blue' => '#0000ff',
  'yellow' => '#ffff00',
};

$set = $m->toSet();

\var_dump($set is \HH\Set<_>);
\var_dump($set);