HH\Map::filter
Returns a Map
containing the values of the current Map
that meet
a supplied condition
public function filter(
(function(Tv):bool) $callback,
): Map<Tk, Tv>;
Only values that meet a certain criteria are affected by a call to
filter()
, while all values are affected by a call to map()
.
The keys associated with the current Map
remain unchanged in the returned
Map
.
Parameters
(function(Tv):bool) $callback
- The callback containing the condition to apply to the currentMap
values.
Return Values
Map<Tk, Tv>
- aMap
containing the values after a user-specified condition is applied.