Returns a ImmVector containing the values of the current ImmVector that meet a supplied condition

public function filter(
  (function(Tv):bool) $callback,
): ImmVector<Tv>;

filter()'s result contains only values that meet the provided criterion; unlike map(), where a value is included for each value in the original ImmVector.


  • (function(Tv):bool) $callback - The callback containing the condition to apply to the current ImmVector values.

Return Values