Returns a ConstVector containing the values of the current ConstVector up to but not including the first value that produces false when passed to the specified callback

public function takeWhile(
  (function(Tv):bool) $fn,
): ConstVector<Tv>;

The returned ConstVector will always be a proper subset of the current ConstVector.


  • (function(Tv):bool) $fn - The callback that is used to determine the stopping condition.

Return Values