Returns the value at the specified key in the current ImmMap

public function at(
  Tk $key,
): Tv;

If the key is not present, an exception is thrown. If you don't want an exception to be thrown, use get() instead.

$v = $map->at($k) is semantically equivalent to $v = $map[$k].


  • Tk $key

Return Values

  • Tv - The value at the specified key; or an exception if the key does not exist.