ConstSet::takeWhile

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

Description

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

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

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

Parameters

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

Return Values