HH\KeyedIterable::takeWhile

Returns a KeyedIterable containing the values of the current KeyedIterable 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,
): KeyedIterable<Tk,Tv>

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

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

Parameters

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

Return Values