DocumentationHackReferenceInterfaceMutableVectortakeWhile

MutableVector::takeWhile

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

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

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

Parameters

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

Returns

MutableVector<Tv> - A MutableVector that is a proper subset of the current MutableVector up until the callback returns false.