Entry_Collection - Code Metrics - Inspection of "Move GF_Query out of \GV\View" - gravityview/GravityView - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — develop (#1425)

by Gennady

created 2020-02-28 09:46 UTC

Entry_Collection A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	380
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	5

Test Coverage

Coverage

86.32%

Importance

Changes

Metric	Value
dl	0
loc	380
ccs	82
cts	95
cp	0.8632
rs	9.6
c	0
b	0
f	0
wmc	35
lcom	1
cbo	5

18 Methods

Rating	Name	Size	Complexity
A	add()	9	2
A	get()	8	3
A	total()	18	4
A	count()	3	1
A	all()	6	3
A	pluck()	10	2
A	last()	6	3
A	first()	6	3
A	fetch()	25	4
A	filter()	8	1
A	sort()	8	1
A	limit()	6	1
A	offset()	6	1
A	page()	6	1
A	add_fetch_callback()	3	1
A	add_count_callback()	3	1
A	add_callback()	7	2
A	clear()	4	1

<?php
namespace GV;

/** If this file is called directly, abort. */
if ( ! defined( 'GRAVITYVIEW_DIR' ) ) {
	die();
}

/**
 * A collection of \GV\Entry objects.
 */
class Entry_Collection extends Collection {
	/**
	 * Lazy fetching and counting of data defers
	 *  all processing of entries and entry data until
	 *  it is really requested.
	 *
	 * @see \GV\Entry_Collection::add_fetch_callback
	 * @see \GV\Entry_Collection::add_count_callback
	 *
	 * @var array Lazy data loading callbacks.
	 */
	private $callbacks = array();

	/**
	 * @var \GV\Entry_Filter[] Filtering criteria.
	 */
	public $filters = array();

	/**
	 * @var \GV\Entry_Sort[] Sorting criteria.
	 */
	public $sorts = array();

	/**
	 * @var int The offset.
	 */
	public $offset = 0;

	/**
	 * @var int The limit.
	 */
	public $limit = 20;

	/**
	 * @var int The current page.
	 */
	public $current_page = 1;

	/**
	 * @var int The number of entries fetched.
	 */
	private $fetched = -1;

	/**
	 * Add an \GV\Entry to this collection.
	 *
	 * @param \GV\Entry $entry The entry to add to the internal array.
	 *
	 * @api
	 * @since 2.0
	 * @return void
	 */
	public function add( $entry ) {
		if ( ! $entry instanceof Entry ) {
			$this->fetched = max( 0, $this->fetched );
			gravityview()->log->error( 'Entry_Collections can only contain objects of type \GV\Entry.' );
			return;
		}
		parent::add( $entry );
		$this->fetched = max( 1, $this->fetched + 1 );
	}

	/**
	 * Get a \GV\Entry from this list.
	 *
	 * @param int $entry_id The ID of the entry to get.
	 * @param string $backend The form backend identifier, allows for multiple form backends in the future. Unused until then.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry|null The \GV\entry with the $entry_id as the ID, or null if not found.
	 */
	public function get( $entry_id, $backend = 'gravityforms' ) {

		foreach ( $this->all() as $entry ) {
			if ( $entry->ID == $entry_id ) {
				return $entry;
			}
		}
		return null;
	}

	/**
	 * Count the total number of \GV\Entry objects that are possible to get.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return int The total number of entries that are fetchable.
	 */
	public function total() {
		$total = 0;

		/** Call all lazy callbacks. */
		foreach ( $this->callbacks as $callback ) {
			if ( $callback[0] != 'count' ) {
				continue;
			}

			$total += $callback[1]( $this->filters );
		}

		if ( ! $total ) {
			$total = parent::count();
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
		}

		return $total - $this->offset;
	}

	/**
	 * Get the total number of entries that are fetched.
	 *
	 * @api
	 * @since develop
	 *
	 * @return int The number of entries fetched now.
	 */
	public function count() {
		return count( $this->fetch()->all() );
	}

	/**
	 * Get the entries as an array.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry[] The entries as an array.
	 */
	public function all() {
		if ( $this->fetched >= 0 || parent::count() ) {
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
			return parent::all();
		}
		return $this->fetch()->all();
	}

	/**
	 * Pluck by key.
	 *
	 * @api
	 * @since develop
	 *
	 * @param string $key The key to pluck by.
	 *
	 * @return array The plucked values.
	 */
	public function pluck( $key ) {
		$result = array();

		foreach ( $this->all() as $entry ) {
			$entry = $entry->as_entry();
			$result[] = Utils::get( $entry, $key, null );
		}

		return $result;
	}

	/**
	 * Get the last \GV\Entry in this collection.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry|null The last entry or null.
	 */
	public function last() {
		if ( $this->fetched >= 0 || parent::count() ) {
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
			return parent::last();
		}
		return $this->fetch()->last();
	}

	/**
	 * Get the first \GV\Entry in this collection.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry|null The first entry or null.
	 */
	public function first() {
		if ( $this->fetched >= 0 || parent::count() ) {
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
			return parent::first();
		}
		return $this->fetch()->first();
	}

	/**
	 * Hydrate this collection now.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry_Collection This collection, now hydrated.
	 */
	public function fetch() {
		if ( $this->fetched >= 0 ) {
			return $this;
		}

		$this->clear();

		/** Calculate the offsets. */
		$offset = new \GV\Entry_Offset();
		$offset->limit = $this->limit;
		$offset->offset = ( $this->limit * ( $this->current_page - 1 ) ) + $this->offset;

		/** Call all lazy callbacks. */
		foreach ( $this->callbacks as $i => $callback ) {
			if ( $callback[0] != 'fetch' ) {
				continue;
			}

			$this->merge( $callback[1]( $this->filters, $this->sorts, $offset ) );
		}

		$this->fetched = parent::count();
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}

		return $this;
	}

	/**
	 * Apply a filter to the current collection.
	 *
	 * This operation is non-destructive as a copy of the collection is returned.
	 *
	 * @param \GV\Entry_Filter $filter The filter to be applied.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry_Collection A copy of the this collection with the filter applied.
	 */
	public function filter( \GV\Entry_Filter $filter ) {
		$collection = clone $this;
		$collection->clear();

		array_push( $collection->filters, $filter );

		return $collection;
	}

	/**
	 * Sort.
	 *
	 * @param \GV\Entry_Sort $sort The sort to apply to this collection.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry_Collection A copy of the this collection with the sort applied.
	 */
	public function sort( $sort ) {
		$collection = clone $this;
		$collection->clear();

		array_push( $collection->sorts, $sort );

		return $collection;
	}

	/**
	 * Limit the fetch to a specified window.
	 *
	 * @param int $limit The limit.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry_Collection A copy of the this collection with the limit applied.
	 */
	public function limit( $limit ) {
		$collection = clone $this;
		$collection->clear();
		$collection->limit = $limit;
		return $collection;
	}

	/**
	 * Add an $offset to these entries.
	 *
	 * Useful, you know, for pagination and stuff. Not too useful directly.
	 *
	 * @see \GV\Entry_Collection::page()
	 *
	 * @param int $offset The number of entries to skip in the database.
	 *
	 * @api
	 * @since 2.0
	 *
	 * @return \GV\Entry_Collection A copy of the this collection with the offset applied.
	 */
	public function offset( $offset ) {
		$collection = clone $this;
		$collection->clear();
		$collection->offset = $offset;
		return $collection;
	}

	/**
	 * Set the current page.
	 *
	 * @param int $page Set the current page to this page. Ends up agumenting the $offset in \GV\Entry_Offset
	 *
	 * @return \GV\Entry_Collection A copy of the this collection with the offset applied.
	 */
	public function page( $page ) {
		$collection = clone $this;
		$collection->clear();
		$collection->current_page = $page;
		return $collection;
	}

	/**
	 * Defer fetching of data to the provided callable.
	 *
	 * The callback signature should be as follows:
	 *  \GV\Entry_Collection callback( \GV\Entry_Filter $filter, \GV\Entry_Sort $sort, \GV\Entry_Offset $offset );
	 *
	 * The methods that trigger the callback are:
	 * - \GV\Entry_Collection::fetch
	 *
	 * ::fetch is triggered via:
	 * - \GV\Entry_Collection::all
	 * - \GV\Entry_Collection::last
	 *
	 * @param callable $callback The callback to call when needed.
	 *
	 * @internal
	 * @since 2.0
	 *
	 * @return void
	 */
	public function add_fetch_callback( $callback ) {
		$this->add_callback( 'fetch', $callback );
	}

	/**
	 * Defer counting of data to the provided callable.
	 *
	 * The callback signature should be as follows:
	 *  int callback( \GV\Entry_Filter $filter );
	 *
	 * The methods that trigger the callback are:
	 * - \GV\Entry_Collection::count
	 *
	 * @param callable $callback The callback to call when needed.
	 *
	 * @internal
	 * @since 2.0
	 *
	 * @return void
	 */
	public function add_count_callback( $callback ) {
		$this->add_callback( 'count', $callback );
	}

	/**
	 * Add a callback for lazy loading/counting.
	 *
	 * @param callable $callback The callback to call when needed.
	 *
	 * @return void
	 */
	private function add_callback( $type, $callback ) {
		if ( ! is_callable( $callback ) ) {
			return;
		}

		$this->callbacks []= array( $type, $callback );
	}

	/**
	 * @inheritdoc
	 */
	public function clear() {
		$this->fetched = -1;
		parent::clear();
	}
}


1		<?php
2		namespace GV;
3
4		/** If this file is called directly, abort. */
5		if ( ! defined( 'GRAVITYVIEW_DIR' ) ) {
6		die();
7		}
8
9		/**
10		* A collection of \GV\Entry objects.
11		*/
12		class Entry_Collection extends Collection {
13		/**
14		* Lazy fetching and counting of data defers
15		* all processing of entries and entry data until
16		* it is really requested.
17		*
18		* @see \GV\Entry_Collection::add_fetch_callback
19		* @see \GV\Entry_Collection::add_count_callback
20		*
21		* @var array Lazy data loading callbacks.
22		*/
23		private $callbacks = array();
24
25		/**
26		* @var \GV\Entry_Filter[] Filtering criteria.
27		*/
28		public $filters = array();
29
30		/**
31		* @var \GV\Entry_Sort[] Sorting criteria.
32		*/
33		public $sorts = array();
34
35		/**
36		* @var int The offset.
37		*/
38		public $offset = 0;
39
40		/**
41		* @var int The limit.
42		*/
43		public $limit = 20;
44
45		/**
46		* @var int The current page.
47		*/
48		public $current_page = 1;
49
50		/**
51		* @var int The number of entries fetched.
52		*/
53		private $fetched = -1;
54
55		/**
56		* Add an \GV\Entry to this collection.
57		*
58		* @param \GV\Entry $entry The entry to add to the internal array.
59		*
60		* @api
61		* @since 2.0
62		* @return void
63		*/
64	77	public function add( $entry ) {
65	77	if ( ! $entry instanceof Entry ) {
66		$this->fetched = max( 0, $this->fetched );
67		gravityview()->log->error( 'Entry_Collections can only contain objects of type \GV\Entry.' );
68		return;
69		}
70	77	parent::add( $entry );
71	77	$this->fetched = max( 1, $this->fetched + 1 );
72	77	}
73
74		/**
75		* Get a \GV\Entry from this list.
76		*
77		* @param int $entry_id The ID of the entry to get.
78		* @param string $backend The form backend identifier, allows for multiple form backends in the future. Unused until then.
79		*
80		* @api
81		* @since 2.0
82		*
83		* @return \GV\Entry\|null The \GV\entry with the $entry_id as the ID, or null if not found.
84		*/
85		public function get( $entry_id, $backend = 'gravityforms' ) {
		0 ignored issues – show Unused Code introduced 2017-08-01 22:04 UTC by Report Bug Copy Issue Report The parameter `$backend` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
86		foreach ( $this->all() as $entry ) {
87		if ( $entry->ID == $entry_id ) {
88		return $entry;
89		}
90		}
91		return null;
92		}
93
94		/**
95		* Count the total number of \GV\Entry objects that are possible to get.
96		*
97		* @api
98		* @since 2.0
99		*
100		* @return int The total number of entries that are fetchable.
101		*/
102	49	public function total() {
103	49	$total = 0;
104
105		/** Call all lazy callbacks. */
106	49	foreach ( $this->callbacks as $callback ) {
107	33	if ( $callback[0] != 'count' ) {
108	33	continue;
109		}
110
111	33	$total += $callback[1]( $this->filters );
112		}
113
114	49	if ( ! $total ) {
115	27	$total = parent::count();
		0 ignored issues – show Comprehensibility Bug introduced 2018-05-08 22:39 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`count()` instead of `total()`). Are you sure this is correct? If so, you might want to change this to `$this->count()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
116		}
117
118	49	return $total - $this->offset;
119		}
120
121		/**
122		* Get the total number of entries that are fetched.
123		*
124		* @api
125		* @since develop
126		*
127		* @return int The number of entries fetched now.
128		*/
129	36	public function count() {
130	36	return count( $this->fetch()->all() );
131		}
132
133		/**
134		* Get the entries as an array.
135		*
136		* @api
137		* @since 2.0
138		*
139		* @return \GV\Entry[] The entries as an array.
140		*/
141	84	public function all() {
142	84	if ( $this->fetched >= 0 \|\| parent::count() ) {
		0 ignored issues – show Comprehensibility Bug introduced 2017-03-29 06:38 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`count()` instead of `all()`). Are you sure this is correct? If so, you might want to change this to `$this->count()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
143	84	return parent::all();
144		}
145	64	return $this->fetch()->all();
146		}
147
148		/**
149		* Pluck by key.
150		*
151		* @api
152		* @since develop
153		*
154		* @param string $key The key to pluck by.
155		*
156		* @return array The plucked values.
157		*/
158	1	public function pluck( $key ) {
159	1	$result = array();
160
161	1	foreach ( $this->all() as $entry ) {
162	1	$entry = $entry->as_entry();
163	1	$result[] = Utils::get( $entry, $key, null );
164		}
165
166	1	return $result;
167		}
168
169		/**
170		* Get the last \GV\Entry in this collection.
171		*
172		* @api
173		* @since 2.0
174		*
175		* @return \GV\Entry\|null The last entry or null.
176		*/
177		public function last() {
178		if ( $this->fetched >= 0 \|\| parent::count() ) {
		0 ignored issues – show Comprehensibility Bug introduced 2017-03-29 06:38 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`count()` instead of `last()`). Are you sure this is correct? If so, you might want to change this to `$this->count()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
179		return parent::last();
180		}
181		return $this->fetch()->last();
182		}
183
184		/**
185		* Get the first \GV\Entry in this collection.
186		*
187		* @api
188		* @since 2.0
189		*
190		* @return \GV\Entry\|null The first entry or null.
191		*/
192	4	public function first() {
193	4	if ( $this->fetched >= 0 \|\| parent::count() ) {
		0 ignored issues – show Comprehensibility Bug introduced 2018-05-08 22:39 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`count()` instead of `first()`). Are you sure this is correct? If so, you might want to change this to `$this->count()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
194	4	return parent::first();
195		}
196	4	return $this->fetch()->first();
197		}
198
199		/**
200		* Hydrate this collection now.
201		*
202		* @api
203		* @since 2.0
204		*
205		* @return \GV\Entry_Collection This collection, now hydrated.
206		*/
207	74	public function fetch() {
208	74	if ( $this->fetched >= 0 ) {
209	27	return $this;
210		}
211
212	74	$this->clear();
213
214		/** Calculate the offsets. */
215	74	$offset = new \GV\Entry_Offset();
216	74	$offset->limit = $this->limit;
217	74	$offset->offset = ( $this->limit * ( $this->current_page - 1 ) ) + $this->offset;
218
219		/** Call all lazy callbacks. */
220	74	foreach ( $this->callbacks as $i => $callback ) {
221	72	if ( $callback[0] != 'fetch' ) {
222	72	continue;
223		}
224
225	72	$this->merge( $callback[1]( $this->filters, $this->sorts, $offset ) );
226		}
227
228	74	$this->fetched = parent::count();
		0 ignored issues – show Comprehensibility Bug introduced 2018-11-21 14:42 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`count()` instead of `fetch()`). Are you sure this is correct? If so, you might want to change this to `$this->count()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
229
230	74	return $this;
231		}
232
233		/**
234		* Apply a filter to the current collection.
235		*
236		* This operation is non-destructive as a copy of the collection is returned.
237		*
238		* @param \GV\Entry_Filter $filter The filter to be applied.
239		*
240		* @api
241		* @since 2.0
242		*
243		* @return \GV\Entry_Collection A copy of the this collection with the filter applied.
244		*/
245	73	public function filter( \GV\Entry_Filter $filter ) {
246	73	$collection = clone $this;
247	73	$collection->clear();
248
249	73	array_push( $collection->filters, $filter );
250
251	73	return $collection;
252		}
253
254		/**
255		* Sort.
256		*
257		* @param \GV\Entry_Sort $sort The sort to apply to this collection.
258		*
259		* @api
260		* @since 2.0
261		*
262		* @return \GV\Entry_Collection A copy of the this collection with the sort applied.
263		*/
264	10	public function sort( $sort ) {
265	10	$collection = clone $this;
266	10	$collection->clear();
267
268	10	array_push( $collection->sorts, $sort );
269
270	10	return $collection;
271		}
272
273		/**
274		* Limit the fetch to a specified window.
275		*
276		* @param int $limit The limit.
277		*
278		* @api
279		* @since 2.0
280		*
281		* @return \GV\Entry_Collection A copy of the this collection with the limit applied.
282		*/
283	73	public function limit( $limit ) {
284	73	$collection = clone $this;
285	73	$collection->clear();
286	73	$collection->limit = $limit;
287	73	return $collection;
288		}
289
290		/**
291		* Add an $offset to these entries.
292		*
293		* Useful, you know, for pagination and stuff. Not too useful directly.
294		*
295		* @see \GV\Entry_Collection::page()
296		*
297		* @param int $offset The number of entries to skip in the database.
298		*
299		* @api
300		* @since 2.0
301		*
302		* @return \GV\Entry_Collection A copy of the this collection with the offset applied.
303		*/
304	73	public function offset( $offset ) {
305	73	$collection = clone $this;
306	73	$collection->clear();
307	73	$collection->offset = $offset;
308	73	return $collection;
309		}
310
311		/**
312		* Set the current page.
313		*
314		* @param int $page Set the current page to this page. Ends up agumenting the $offset in \GV\Entry_Offset
315		*
316		* @return \GV\Entry_Collection A copy of the this collection with the offset applied.
317		*/
318	73	public function page( $page ) {
319	73	$collection = clone $this;
320	73	$collection->clear();
321	73	$collection->current_page = $page;
322	73	return $collection;
323		}
324
325		/**
326		* Defer fetching of data to the provided callable.
327		*
328		* The callback signature should be as follows:
329		* \GV\Entry_Collection callback( \GV\Entry_Filter $filter, \GV\Entry_Sort $sort, \GV\Entry_Offset $offset );
330		*
331		* The methods that trigger the callback are:
332		* - \GV\Entry_Collection::fetch
333		*
334		* ::fetch is triggered via:
335		* - \GV\Entry_Collection::all
336		* - \GV\Entry_Collection::last
337		*
338		* @param callable $callback The callback to call when needed.
339		*
340		* @internal
341		* @since 2.0
342		*
343		* @return void
344		*/
345	72	public function add_fetch_callback( $callback ) {
346	72	$this->add_callback( 'fetch', $callback );
347	72	}
348
349		/**
350		* Defer counting of data to the provided callable.
351		*
352		* The callback signature should be as follows:
353		* int callback( \GV\Entry_Filter $filter );
354		*
355		* The methods that trigger the callback are:
356		* - \GV\Entry_Collection::count
357		*
358		* @param callable $callback The callback to call when needed.
359		*
360		* @internal
361		* @since 2.0
362		*
363		* @return void
364		*/
365	72	public function add_count_callback( $callback ) {
366	72	$this->add_callback( 'count', $callback );
367	72	}
368
369		/**
370		* Add a callback for lazy loading/counting.
371		*
372		* @param callable $callback The callback to call when needed.
373		*
374		* @return void
375		*/
376	72	private function add_callback( $type, $callback ) {
377	72	if ( ! is_callable( $callback ) ) {
378		return;
379		}
380
381	72	$this->callbacks []= array( $type, $callback );
382	72	}
383
384		/**
385		* @inheritdoc
386		*/
387	74	public function clear() {
388	74	$this->fetched = -1;
389	74	parent::clear();
390	74	}
391		}
392

gravityview / GravityView

Pull Request — develop (#1425)

Entry_Collection A

Complexity

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18 Methods

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