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

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

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


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

Return Values