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<?php |
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namespace Narrowspark\Arr; |
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class Transform |
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{ |
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/** |
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* Dotted array cache. |
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* |
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* @var array |
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*/ |
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protected $dotted = []; |
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/** |
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* A instance of Access |
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* |
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* @var \Narrowspark\Arr\Access |
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*/ |
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protected $access; |
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/** |
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* A instance of Access |
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* |
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* @var \Narrowspark\Arr\Enumerator |
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*/ |
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protected $enumerator; |
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public function __construct() |
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{ |
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$this->access = new Access(); |
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$this->enumerator = new Enumerator(); |
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} |
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/** |
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* Pop value from sub array. |
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* |
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* @param array $array |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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public static function pop(array $array, $key) |
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{ |
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$keys = explode('.', $key); |
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foreach ($keys as $key) { |
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if (! isset($array[$key])) { |
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return; |
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} |
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$array = $array[$key]; |
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} |
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if (! is_array($array)) { |
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return; |
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} |
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return array_pop($array); |
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} |
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/** |
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* Swap two elements between positions. |
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* |
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* @param array $array array to swap |
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* @param string $swapA |
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* @param string $swapB |
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* |
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* @return array|null |
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*/ |
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public function swap(array $array, $swapA, $swapB) |
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{ |
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list($array[$swapA], $array[$swapB]) = [$array[$swapB], $array[$swapA]]; |
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return $array; |
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} |
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/** |
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* Create a new array consisting of every n-th element. |
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* |
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* @param array $array |
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* @param int $step |
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* @param int $offset |
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* |
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* @return array |
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*/ |
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public static function every($array, $step, $offset = 0) |
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{ |
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$new = []; |
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$position = 0; |
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foreach ($array as $key => $item) { |
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if ($position % $step === $offset) { |
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$new[] = $item; |
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} |
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++$position; |
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} |
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return $new; |
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} |
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/** |
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* Indexes an array depending on the values it contains. |
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* |
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* @param array $array |
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* @param callable $callback Function to combine values. |
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* @param bool $overwrite Should duplicate keys be overwritten? |
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* |
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* @return array Indexed values. |
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*/ |
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public function combine(array $array, callable $callback, $overwrite = true) |
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{ |
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$combined = []; |
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foreach ($array as $key => $value) { |
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$combinator = call_user_func($callback, $value, $key); |
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// fix for hhvm #1871 bug |
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if (defined('HHVM_VERSION')) { |
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$combinator->next(); |
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} |
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$index = $combinator->key(); |
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if ($overwrite || ! isset($combined[$index])) { |
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$combined[$index] = $combinator->current(); |
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} |
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} |
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return $combined; |
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} |
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/** |
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* Collapse a nested array down to an array of flat key=>value pairs |
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*/ |
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public function collapse(array $array) |
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{ |
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$newArray = []; |
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foreach ($array as $key => $value) { |
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if (is_array($value)) { |
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// strip any manually added '.' |
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if (preg_match('/\./', $key)) { |
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$key = substr($key, 0, -2); |
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} |
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$this->recurseCollapse($value, $newArray, (array) $key); |
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} else { |
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$newArray[$key] = $value; |
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} |
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} |
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return $newArray; |
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} |
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/** |
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* Divide an array into two arrays. One with keys and the other with values. |
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* |
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* @param array $array |
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* |
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* @return array[] |
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*/ |
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public function divide($array) |
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{ |
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return [array_keys($array), array_values($array)]; |
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} |
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/** |
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* Stripe all empty items. |
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* |
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* @param array $array |
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* |
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* @return array |
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*/ |
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public function stripEmpty(array $array) |
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{ |
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return array_filter($array, function ($item) { |
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if (is_null($item)) { |
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return false; |
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} |
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if (! trim($item)) { |
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return false; |
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} |
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return true; |
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}); |
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} |
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/** |
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* Remove all instances of $ignore found in $elements (=== is used). |
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* |
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* @param array $array |
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* @param array $ignore |
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* |
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* @return array |
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*/ |
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public function without(array $array, array $ignore) |
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{ |
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foreach ($array as $key => $node) { |
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if (in_array($node, $ignore, true)) { |
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unset($array[$key]); |
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} |
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} |
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return array_values($array); |
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} |
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/** |
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* Reindexes a list of values. |
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* |
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* @param array $array |
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* @param array $map An map of correspondances of the form |
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* ['currentIndex' => 'newIndex']. |
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* @param bool $unmapped Whether or not to keep keys that are not |
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* remapped. |
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* |
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* @return array |
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*/ |
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public function reindex(array $array, array $map, $unmapped = true) |
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{ |
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$reindexed = $unmapped |
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? $array |
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: []; |
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foreach ($map as $from => $to) { |
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if (isset($array[$from])) { |
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$reindexed[$to] = $array[$from]; |
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} |
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} |
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return $reindexed; |
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} |
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/** |
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* Merges two or more arrays into one recursively. |
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* |
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* @param array $arrays. |
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* |
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* @return array |
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*/ |
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public function merge(array $arrays) |
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{ |
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$args = func_get_args(); |
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$array = array_shift($args); |
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while (! empty($args)) { |
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$next = array_shift($args); |
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foreach ($next as $key => $value) { |
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if (is_int($key)) { |
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if (isset($array[$key])) { |
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$array[] = $value; |
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} else { |
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$array[$key] = $value; |
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} |
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} elseif (is_array($value) && isset($array[$key]) && is_array($array[$key])) { |
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$array[$key] = $this->merge($array[$key], $value); |
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} else { |
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$array[$key] = $value; |
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} |
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} |
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} |
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return $array; |
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} |
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/** |
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* Makes every value that is numerically indexed a key, given $default |
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* as value. |
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* |
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* @param array $array |
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* @param mixed $default |
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* |
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* @return array |
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*/ |
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public function normalize(array $array, $default) |
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{ |
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$normalized = []; |
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foreach ($array as $key => $value) { |
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if (is_numeric($key)) { |
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$key = $value; |
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$value = $default; |
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} |
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$normalized[$key] = $value; |
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} |
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return $normalized; |
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} |
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292
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/** |
293
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* Extend one array with another. |
294
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* |
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* @param array $arrays |
296
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* |
297
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* @return array |
298
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*/ |
299
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public function extend(array $arrays) |
300
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{ |
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$merged = []; |
302
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303
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foreach (func_get_args() as $array) { |
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foreach ($array as $key => $value) { |
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if (is_array($value) && $this->access->has($merged, $key) && is_array($merged[$key])) { |
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$merged[$key] = $this->extend($merged[$key], $value); |
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} else { |
308
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$merged[$key] = $value; |
309
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} |
310
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} |
311
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} |
312
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313
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return $merged; |
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} |
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316
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/** |
317
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* Transforms a 1-dimensional array into a multi-dimensional one, |
318
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* exploding keys according to a separator. |
319
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* |
320
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* @param array $array |
321
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* |
322
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* @return array |
323
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*/ |
324
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public function asHierarchy(array $array) |
325
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{ |
326
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$hierarchy = []; |
327
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328
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foreach ($array as $key => $value) { |
329
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$segments = explode('.', $key); |
330
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$valueSegment = array_pop($segments); |
331
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$branch = &$hierarchy; |
332
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333
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1 |
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foreach ($segments as $segment) { |
334
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1 |
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if (! isset($branch[$segment])) { |
335
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$branch[$segment] = []; |
336
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} |
337
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338
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$branch = &$branch[$segment]; |
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} |
340
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341
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$branch[$valueSegment] = $value; |
342
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} |
343
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344
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return $hierarchy; |
345
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} |
346
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347
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/** |
348
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* Separates elements from an array into groups. |
349
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* The function maps an element to the key that will be used for grouping. |
350
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* If no function is passed, the element itself will be used as key. |
351
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* |
352
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* @param array $array |
353
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* @param callable|null $callback |
354
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* |
355
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* @return array |
356
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*/ |
357
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public function groupBy(array $array, callable $callback = null) |
358
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{ |
359
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$callback = $callback ?: function ($value) { |
360
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return $value; |
361
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}; |
362
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363
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1 |
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return array_reduce( |
364
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$array, |
365
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1 |
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function ($buckets, $value) use ($callback) { |
366
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1 |
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$key = call_user_func($callback, $value); |
367
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368
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1 |
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if (! array_key_exists($key, $buckets)) { |
369
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$buckets[$key] = []; |
370
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1 |
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} |
371
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372
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1 |
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$buckets[$key][] = $value; |
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374
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return $buckets; |
375
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}, |
376
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[] |
377
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1 |
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); |
378
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} |
379
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380
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/** |
381
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* Flatten a multi-dimensional associative array with dots. |
382
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* |
383
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* @param array $array |
384
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* @param string $prepend |
385
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* |
386
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* @return array |
387
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*/ |
388
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4 |
|
public function dot($array, $prepend = '') |
389
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|
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{ |
390
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4 |
|
$cache = serialize(['array' => $array, 'prepend' => $prepend]); |
391
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|
392
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4 |
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if (array_key_exists($cache, $this->dotted)) { |
393
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1 |
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return $this->dotted[$cache]; |
394
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} |
395
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396
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4 |
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$results = []; |
397
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398
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4 |
View Code Duplication |
foreach ($array as $key => $value) { |
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|
399
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4 |
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if (is_array($value)) { |
400
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2 |
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$results = array_merge($results, $this->dot($value, $prepend . $key . '.')); |
401
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2 |
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} else { |
402
|
4 |
|
$results[$prepend . $key] = $value; |
403
|
|
|
} |
404
|
4 |
|
} |
405
|
|
|
|
406
|
4 |
|
return $this->dotted[$cache] = $results; |
407
|
|
|
} |
408
|
|
|
|
409
|
|
|
/** |
410
|
|
|
* Expand a dotted array. Acts the opposite way of Arr::dot(). |
411
|
|
|
* |
412
|
|
|
* @param array $array |
413
|
|
|
* @param bool $recursively |
414
|
|
|
* |
415
|
|
|
* @return array |
416
|
|
|
*/ |
417
|
4 |
|
public static function unDot($array, $recursively = true) |
418
|
|
|
{ |
419
|
4 |
|
$results = []; |
420
|
|
|
|
421
|
4 |
|
foreach ($array as $key => $value) { |
422
|
3 |
|
if (count($dottedKeys = explode('.', $key, 2)) > 1) { |
423
|
3 |
|
$results[$dottedKeys[0]][$dottedKeys[1]] = $value; |
424
|
3 |
|
} else { |
425
|
3 |
|
$results[$key] = $value; |
426
|
|
|
} |
427
|
4 |
|
} |
428
|
|
|
|
429
|
4 |
|
if ($recursively) { |
430
|
4 |
|
foreach ($results as $key => $value) { |
431
|
3 |
|
if (is_array($value) && ! empty($value)) { |
432
|
3 |
|
$results[$key] = self::unDot($value, $recursively); |
433
|
3 |
|
} |
434
|
4 |
|
} |
435
|
4 |
|
} |
436
|
|
|
|
437
|
4 |
|
return $results; |
438
|
|
|
} |
439
|
|
|
|
440
|
|
|
/** |
441
|
|
|
* Flatten a nested array to a separated key. |
442
|
|
|
* |
443
|
|
|
* @param array $array |
444
|
|
|
* @param string|null $separator |
445
|
|
|
* @param string $prepend |
446
|
|
|
* |
447
|
|
|
* @return array |
448
|
|
|
*/ |
449
|
1 |
|
public function flatten(array $array, $separator = null, $prepend = '') |
450
|
|
|
{ |
451
|
1 |
|
$flattened = []; |
452
|
|
|
|
453
|
1 |
View Code Duplication |
foreach ($array as $key => $value) { |
|
|
|
|
454
|
1 |
|
if (is_array($value)) { |
455
|
1 |
|
$flattened = array_merge($flattened, $this->flatten($value, $separator, $prepend . $key . $separator)); |
456
|
1 |
|
} else { |
457
|
1 |
|
$flattened[$prepend . $key] = $value; |
458
|
|
|
} |
459
|
1 |
|
} |
460
|
|
|
|
461
|
1 |
|
return $flattened; |
462
|
|
|
} |
463
|
|
|
|
464
|
|
|
/** |
465
|
|
|
* Expand a flattened array with dots to a multi-dimensional associative array. |
466
|
|
|
* |
467
|
|
|
* @param array $array |
468
|
|
|
* @param string $prepend |
469
|
|
|
* |
470
|
|
|
* @return array |
471
|
|
|
*/ |
472
|
4 |
|
public function expand(array $array, $prepend = '') |
473
|
|
|
{ |
474
|
4 |
|
$results = []; |
475
|
|
|
|
476
|
4 |
|
if ($prepend) { |
477
|
2 |
|
$prepend .= '.'; |
478
|
2 |
|
} |
479
|
|
|
|
480
|
4 |
|
foreach ($array as $key => $value) { |
481
|
4 |
|
if ($prepend) { |
482
|
2 |
|
$pos = strpos($key, $prepend); |
483
|
|
|
|
484
|
2 |
|
if ($pos === 0) { |
485
|
1 |
|
$key = substr($key, strlen($prepend)); |
486
|
1 |
|
} |
487
|
2 |
|
} |
488
|
|
|
|
489
|
4 |
|
$results = $this->access->set($results, $key, $value); |
490
|
4 |
|
} |
491
|
|
|
|
492
|
4 |
|
return $results; |
493
|
|
|
} |
494
|
|
|
|
495
|
|
|
/** |
496
|
|
|
* Reset all numerical indexes of an array (start from zero). |
497
|
|
|
* Non-numerical indexes will stay untouched. Returns a new array. |
498
|
|
|
* |
499
|
|
|
* @param array $array |
500
|
|
|
* @param bool|false $deep |
501
|
|
|
* |
502
|
|
|
* @return array |
503
|
|
|
*/ |
504
|
3 |
|
public function reset(array $array, $deep = false) |
505
|
|
|
{ |
506
|
3 |
|
$target = []; |
507
|
|
|
|
508
|
3 |
|
foreach ($array as $key => $value) { |
509
|
3 |
|
if ($deep && is_array($value)) { |
510
|
1 |
|
$value = $this->reset($value); |
511
|
1 |
|
} |
512
|
|
|
|
513
|
3 |
|
if (is_numeric($key)) { |
514
|
3 |
|
$target[] = $value; |
515
|
3 |
|
} else { |
516
|
3 |
|
$target[$key] = $value; |
517
|
|
|
} |
518
|
3 |
|
} |
519
|
|
|
|
520
|
3 |
|
return $target; |
521
|
|
|
} |
522
|
|
|
|
523
|
|
|
/** |
524
|
|
|
* Extend one array with another. Non associative arrays will not be merged |
525
|
|
|
* but rather replaced. |
526
|
|
|
* |
527
|
|
|
* @param array $arrays |
528
|
|
|
* |
529
|
|
|
* @return array |
530
|
|
|
*/ |
531
|
4 |
|
public function extendDistinct(array $arrays) |
|
|
|
|
532
|
|
|
{ |
533
|
4 |
|
$merged = []; |
534
|
|
|
|
535
|
4 |
|
foreach (func_get_args() as $array) { |
536
|
4 |
|
foreach ($array as $key => $value) { |
537
|
4 |
|
if (is_array($value) && $this->access->has($merged, $key) && is_array($merged[$key])) { |
538
|
3 |
|
if ($this->enumerator->isAssoc($value) && $this->enumerator->isAssoc($merged[$key])) { |
539
|
2 |
|
$merged[$key] = $this->extendDistinct($merged[$key], $value); |
540
|
|
|
|
541
|
2 |
|
continue; |
542
|
|
|
} |
543
|
2 |
|
} |
544
|
|
|
|
545
|
4 |
|
$merged[$key] = $value; |
546
|
4 |
|
} |
547
|
4 |
|
} |
548
|
|
|
|
549
|
4 |
|
return $merged; |
550
|
|
|
} |
551
|
|
|
|
552
|
|
|
/** |
553
|
|
|
* Sort the array using the given callback. |
554
|
|
|
* |
555
|
|
|
* @param array $array |
556
|
|
|
* @param callable $callback |
557
|
|
|
* @param int $options |
558
|
|
|
* @param bool $descending |
559
|
|
|
* |
560
|
|
|
* @return array |
561
|
|
|
*/ |
562
|
1 |
|
public function sort(array $array, callable $callback, $options = SORT_REGULAR, $descending = false) |
563
|
|
|
{ |
564
|
1 |
|
$results = []; |
565
|
|
|
|
566
|
|
|
// First we will loop through the items and get the comparator from a callback |
567
|
|
|
// function which we were given. Then, we will sort the returned values and |
568
|
|
|
// and grab the corresponding values for the sorted keys from this array. |
569
|
1 |
|
foreach ($array as $key => $value) { |
570
|
1 |
|
$results[$key] = $callback($value, $key); |
571
|
1 |
|
} |
572
|
|
|
|
573
|
1 |
|
$descending ? arsort($results, $options) |
574
|
1 |
|
: asort($results, $options); |
575
|
|
|
|
576
|
|
|
// Once we have sorted all of the keys in the array, we will loop through them |
577
|
|
|
// and grab the corresponding model so we can set the underlying items list |
578
|
|
|
// to the sorted version. Then we'll just return the collection instance. |
579
|
1 |
|
foreach (array_keys($results) as $key) { |
580
|
1 |
|
$results[$key] = $array[$key]; |
581
|
1 |
|
} |
582
|
|
|
|
583
|
1 |
|
return $results; |
584
|
|
|
} |
585
|
|
|
|
586
|
|
|
/** |
587
|
|
|
* Recursively sort an array by keys and values. |
588
|
|
|
* |
589
|
|
|
* @param array $array |
590
|
|
|
* |
591
|
|
|
* @return array |
592
|
|
|
*/ |
593
|
1 |
|
public function sortRecursive(array $array) |
594
|
|
|
{ |
595
|
1 |
|
foreach ($array as &$value) { |
596
|
1 |
|
if (is_array($value)) { |
597
|
1 |
|
$value = $this->sortRecursive($value); |
598
|
1 |
|
} |
599
|
1 |
|
} |
600
|
|
|
|
601
|
|
|
// sort associative array |
602
|
1 |
|
if ($this->enumerator->isAssoc($array)) { |
603
|
1 |
|
ksort($array); |
604
|
|
|
// sort regular array |
605
|
1 |
|
} else { |
606
|
1 |
|
sort($array); |
607
|
|
|
} |
608
|
|
|
|
609
|
1 |
|
return $array; |
610
|
|
|
} |
611
|
|
|
|
612
|
|
|
/** |
613
|
|
|
* Will turn each element in $arr into an array then appending |
614
|
|
|
* the associated indexs from the other arrays into this array as well. |
615
|
|
|
* |
616
|
|
|
* @param array $array |
617
|
|
|
* @param array $arrays |
618
|
|
|
* |
619
|
|
|
* @return array |
620
|
|
|
*/ |
621
|
2 |
|
public function zip(array $array, array $arrays) |
|
|
|
|
622
|
|
|
{ |
623
|
2 |
|
$args = func_get_args(); |
624
|
2 |
|
array_shift($args); |
625
|
|
|
|
626
|
2 |
|
foreach ($array as $key => $value) { |
627
|
2 |
|
$array[$key] = [$value]; |
628
|
|
|
|
629
|
2 |
|
foreach ($args as $k => $v) { |
630
|
2 |
|
$array[$key][] = current($args[$k]); |
631
|
|
|
|
632
|
2 |
|
if (next($args[$k]) === false && $args[$k] !== [null]) { |
633
|
1 |
|
$args[$k] = [null]; |
634
|
1 |
|
} |
635
|
2 |
|
} |
636
|
2 |
|
} |
637
|
|
|
|
638
|
2 |
|
return $array; |
639
|
|
|
} |
640
|
|
|
|
641
|
|
|
/** |
642
|
|
|
* Recurse through an array, add the leaf items to the $newArray var |
643
|
|
|
* |
644
|
|
|
* @param array $subject |
645
|
|
|
* @param array &$newArray |
646
|
|
|
* @param array $stack |
647
|
|
|
* |
648
|
|
|
* @return string[]|null |
649
|
|
|
*/ |
650
|
3 |
|
private function recurseCollapse(array $subject, array &$newArray, $stack = []) |
651
|
|
|
{ |
652
|
3 |
|
foreach ($subject as $key => $value) { |
653
|
3 |
|
$fstack = array_merge($stack, [$key]); |
654
|
|
|
|
655
|
3 |
|
if (is_array($value)) { |
656
|
3 |
|
$this->recurseCollapse($value, $newArray, $fstack); |
657
|
3 |
|
} else { |
658
|
3 |
|
$top = array_shift($fstack); |
659
|
3 |
|
$arrayPart = count($fstack) ? '.' . implode('.', $fstack) : ''; |
660
|
3 |
|
$newArray[$top . $arrayPart] = $value; |
661
|
|
|
} |
662
|
3 |
|
} |
663
|
3 |
|
} |
664
|
|
|
} |
665
|
|
|
|