HH\Lib\Dict\flatten
Requires the Hack Standard Library to be installed.
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This function is available as Dict\flatten() in Facebook's www repository.
Returns a new dict formed by merging the KeyedTraversable elements of the given Traversable
namespace HH\Lib\Dict;
function flatten<Tk as arraykey, Tv>(
Traversable<KeyedContainer<Tk, Tv>> $traversables,
): dict<Tk, Tv>;
In the case of duplicate keys, later values will overwrite the previous ones.
For a fixed number of KeyedTraversables, see Dict\merge().
Time complexity: O(n), where n is the combined size of all the
$traversables
Space complexity: O(n), where n is the combined size of all the
$traversables
Parameters
Returns
dict<Tk, Tv>