HH\ImmMap::filter
Returns an ImmMap
containing the values of the current ImmMap
that
meet a supplied condition
public function filter(
(function(Tv): bool) $callback,
): ImmMap<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 ImmMap
remain unchanged in the
returned Map
.
Guide
Parameters
(function(Tv): bool) $callback
- The callback containing the condition to apply to the currentImmMap
values.
Returns
ImmMap<Tk, Tv>
- anImmMap
containing the values after a user-specified condition is applied.
Examples
See Map::filter
for usage examples.