/**
* Set Difference
*
* "returns the difference of sets S and T."
*
* This function can take multiple arrays, Sets, or values
* mixed together
*
* @static
*
* @link http://en.wikipedia.org/wiki/Set_(abstract_data_type)#Core_set-theoretical_operations [English]
*
* @param mixed $S,... Data to difference
*
* @return array Difference array
*
*/
public static function difference()
{
$cmp = function ($a, $b) {
if ($a === $b) {
return 0;
} else {
return -1;
}
};
// This closures are more compatible with set values
$result = null;
foreach (func_get_args() as $arg) {
if ($arg instanceof TypesResource\SetInterface) {
if ($result === null) {
$result = $arg->getPlainArray();
} else {
$result = array_udiff($result, $arg->getPlainArray(), $cmp);
}
} else {
if (is_array($arg)) {
if ($result === null) {
$result = $arg;
} else {
$result = array_udiff($result, $arg, $cmp);
}
} else {
if ($result === null) {
$result = array($arg);
} else {
$result = array_udiff($result, array($arg), $cmp);
}
}
}
}
// More object compatible than array_unique SORT_REGULAR
return StandardResource\ArrayUtilities::returnUnique($result);
}
/**
* Get A Range Of Indexes
*
* This gets an array of objects that have priorities between ranges
*
* NOTE: The utility function must be used because of incompatibility
* of array_unique algorithm
*
* @param Falcraft\Data\Types\Range $r The range to include
*
* @return array The appropriate array
*
*/
public function indexRange(Range $r)
{
return StandardResource\ArrayUtilities::returnUnique(array_merge($this->index($r->getMinimum(), self::HIGHER), $this->index($r->getMaximum(), self::LOWER)));
}
