HH\Lib\Dict\filter_async
Requires the Hack Standard Library to be installed.
Facebook Engineer?
This function is available as Dict\gen_filter() in Facebook's www repository.
Returns a new dict containing only the values for which the given async
predicate returns true
namespace HH\Lib\Dict;
function filter_async<Tk as arraykey, Tv>(
KeyedContainer<Tk, Tv> $traversable,
(function(Tv): Awaitable<bool>) $value_predicate,
): Awaitable<dict<Tk, Tv>>;
For non-async predicates, see Dict\filter().
Time complexity: O(n * p), where p is the complexity of $value_predicate
Space complexity: O(n)
Parameters
KeyedContainer<Tk, Tv> $traversable(function(Tv): Awaitable<bool>) $value_predicate