HH\KeyedIterable::filterWithKey

Returns a KeyedIterable containing the values of the current KeyedIterable that meet a supplied condition applied to its keys and values

public function filterWithKey(
  (function(Tk, Tv): bool) $callback,
): KeyedIterable<Tk, Tv>;

Only keys and values that meet a certain criteria are affected by a call to filterWithKey(), while all values are affected by a call to mapWithKey().

Parameters

• (function(Tk, Tv): bool) $callback

Returns

• KeyedIterable<Tk,Tv> - a KeyedIterable containing the values after a user-specified condition is applied to the keys and values of the current KeyedIterable.