/**
* Alias: unique
*
* @chainable
* @category Arrays
* @param array $xs
* @param callable|string $f
* @return array
*/
public static function uniq($xs, $f = null)
{
$f = static::createCallback($f);
$set = new Internal\Set();
$result = [];
foreach ($xs as $k => $x) {
if ($set->add(call_user_func($f, $x, $k, $xs))) {
$result[$k] = $x;
}
}
return $result;
}
/**
* Alias: unique
*
* @chainable
* @category Arrays
* @param array $xs
* @param callable|string $f
* @return Generator
*/
public static function uniq($xs, $f = null)
{
$f = static::createCallback($f);
$set = new Internal\Set();
foreach ($xs as $k => $x) {
if ($set->add(call_user_func($f, $x, $k, $xs))) {
(yield $k => $x);
}
}
}