ConstIndexAccess::at
Returns the value at the specified key in the current collection
public function at(
Tk $k,
): 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 = $vec->at($k) is semantically equivalent to $v = $vec[$k].
Parameters
Tk $k- the key from which to retrieve the value.
Returns
Tv- The value at the specified key; or an exception if the key does not exist.