Returns an Awaitable of Map of ResultOrExceptionWrapper after a filtering operation has been applied to each key/value pair in the provided KeyedTraversable

namespace HH\Asio;

function mfkw<Tk, T>(
    KeyedTraversable<Tk, T> $inputs,
  (function(Tk,T):Awaitable<bool>) $callable,
): Awaitable<Map<Tk, ResultOrExceptionWrapper<T>>>;

This function is similar to mfk(), except the Map in the returned Awaitable contains values of ResultOrExceptionWrapper instead of raw values.

This function is similar to Map::filterWithKey(), but the filtering of the keys and values is done using Awaitables.

This function is called mfkw because we are returning a map, doing a filtering operation on keys and values, and each value member in the Map is wrapped by a ResultOrExceptionWrapper.

$callable must return an Awaitable of bool.

The ResultOrExceptionWrappers in the Map of the returned Awaitable are not available until you await or join the returned Awaitable.


Return Values