HH\Lib\Dict\map
Requires the Hack Standard Library to be installed.
Facebook Engineer?
This function is available as Dict\map() in Facebook's www repository.
Returns a new dict where each value is the result of calling the given function on the original value
namespace HH\Lib\Dict;
function map<Tk as arraykey, Tv1, Tv2>(
KeyedTraversable<Tk, Tv1> $traversable,
(function(Tv1): Tv2) $value_func,
): dict<Tk, Tv2>;
To use an async function, see Dict\map_async().
Time complexity: O(n * f), where f is the complexity of $value_func
Space complexity: O(n)
Parameters
KeyedTraversable<Tk, Tv1> $traversable(function(Tv1): Tv2) $value_func
Returns
dict<Tk, Tv2>