Diff::getChanges() - Code Metrics - Inspection of "Merge pull request #113 from wmde/lasttest" - wmde/Diff - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 71d19a...11b062 )

by adam

created 2018-09-25 10:00 UTC

Diff::getChanges() A

↳ Parent: Diff

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	3
ccs	2
cts	2
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
crap	1

<?php

declare( strict_types = 1 );

namespace Diff\DiffOp\Diff;

use ArrayObject;
use Diff\DiffOp\DiffOp;
use Diff\DiffOp\DiffOpAdd;
use Diff\DiffOp\DiffOpChange;
use Diff\DiffOp\DiffOpRemove;
use InvalidArgumentException;

/**
 * Base class for diffs. Diffs are collections of DiffOp objects,
 * and are themselves DiffOp objects as well.
 *
 * @since 0.1
 *
 * @license BSD-3-Clause
 * @author Jeroen De Dauw < [email protected] >
 * @author Daniel Kinzler
 * @author Thiemo Kreuz
 */
class Diff extends ArrayObject implements DiffOp {

	/**
	 * @var bool|null
	 */
	private $isAssociative = null;

	/**
	 * Pointers to the operations of certain types for quick lookup.
	 *
	 * @var array[]
	 */
	private $typePointers = [
		'add' => [],
		'remove' => [],
		'change' => [],
		'list' => [],
		'map' => [],
		'diff' => [],
	];

	/**
	 * @var int
	 */
	private $indexOffset = 0;

	/**
	 * @since 0.1
	 *
	 * @param DiffOp[] $operations
	 * @param bool|null $isAssociative
	 *
	 * @throws InvalidArgumentException
	 */
	public function __construct( array $operations = [], $isAssociative = null ) {
		if ( $isAssociative !== null && !is_bool( $isAssociative ) ) {
			throw new InvalidArgumentException( '$isAssociative should be a boolean or null' );
		}

		parent::__construct( [] );

		foreach ( $operations as $offset => $operation ) {
			if ( !( $operation instanceof DiffOp ) ) {
				throw new InvalidArgumentException( 'All elements fed to the Diff constructor should be of type DiffOp' );
			}

			$this->offsetSet( $offset, $operation );
		}

		$this->isAssociative = $isAssociative;
	}

	/**
	 * @since 0.1
	 *
	 * @return DiffOp[]
	 */
	public function getOperations(): array {
		return $this->getArrayCopy();
	}

	/**
	 * @since 0.1
	 *
	 * @param string $type
	 *
	 * @return DiffOp[]
	 */
	public function getTypeOperations( string $type ): array {
		return array_intersect_key(
			$this->getArrayCopy(),
			array_flip( $this->typePointers[$type] )
		);
	}

	/**
	 * @since 0.1
	 *
	 * @param DiffOp[] $operations
	 */
	public function addOperations( array $operations ) {
		foreach ( $operations as $operation ) {
			$this->append( $operation );
		}
	}

	/**
	 * Gets called before a new element is added to the ArrayObject.
	 *
	 * At this point the index is always set (ie not null) and the
	 * value is always of the type returned by @see getObjectType.
	 *
	 * Should return a boolean. When false is returned the element
	 * does not get added to the ArrayObject.
	 *
	 * @param int|string $index
	 * @param DiffOp $value
	 *
	 * @return bool
	 * @throws InvalidArgumentException
	 */
	private function preSetElement( $index, DiffOp $value ): bool {
		if ( $this->isAssociative === false && ( $value->getType() !== 'add' && $value->getType() !== 'remove' ) ) {
			throw new InvalidArgumentException( 'Diff operation with invalid type "' . $value->getType() . '" provided.' );
		}

		if ( array_key_exists( $value->getType(), $this->typePointers ) ) {
			$this->typePointers[$value->getType()][] = $index;
		}
		else {
			throw new InvalidArgumentException( 'Diff operation with invalid type "' . $value->getType() . '" provided.' );
		}

		return true;
	}

	/**
	 * @see Serializable::unserialize
	 *
	 * @since 0.1
	 *
	 * @param string $serialization
	 */
	public function unserialize( $serialization ) {
		$serializationData = unserialize( $serialization );

		foreach ( $serializationData['data'] as $offset => $value ) {
			// Just set the element, bypassing checks and offset resolving,
			// as these elements have already gone through this.
			parent::offsetSet( $offset, $value );
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

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

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

		$this->indexOffset = $serializationData['index'];

		$this->typePointers = $serializationData['typePointers'];

		if ( array_key_exists( 'assoc', $serializationData ) ) {
			$this->isAssociative = $serializationData['assoc'] === 'n' ? null : $serializationData['assoc'] === 't';
		}
	}

	/**
	 * @since 0.1
	 *
	 * @return DiffOpAdd[]
	 */
	public function getAdditions(): array {
		return $this->getTypeOperations( 'add' );
	}

	/**
	 * @since 0.1
	 *
	 * @return DiffOpRemove[]
	 */
	public function getRemovals(): array {
		return $this->getTypeOperations( 'remove' );
	}

	/**
	 * @since 0.1
	 *
	 * @return DiffOpChange[]
	 */
	public function getChanges(): array {
		return $this->getTypeOperations( 'change' );
	}

	/**
	 * @since 0.1
	 *
	 * @return array of mixed
	 */
	public function getAddedValues(): array {
		return array_map(
			function( DiffOpAdd $addition ) {
				return $addition->getNewValue();
			},
			$this->getTypeOperations( 'add' )
		);
	}

	/**
	 * @since 0.1
	 *
	 * @return array of mixed
	 */
	public function getRemovedValues(): array {
		return array_map(
			function( DiffOpRemove $addition ) {
				return $addition->getOldValue();
			},
			$this->getTypeOperations( 'remove' )
		);
	}

	/**
	 * @see DiffOp::isAtomic
	 *
	 * @since 0.1
	 *
	 * @return bool
	 */
	public function isAtomic(): bool {
		return false;
	}

	/**
	 * @see DiffOp::getType
	 *
	 * @since 0.1
	 *
	 * @return string
	 */
	public function getType(): string {
		return 'diff';
	}

	/**
	 * Counts the number of atomic operations in the diff.
	 * This means the size of a diff with as elements only empty diffs will be 0.
	 * Or that the size of a diff with one atomic operation and one diff that itself
	 * holds two atomic operations will be 3.
	 *
	 * @see Countable::count
	 *
	 * @since 0.1
	 *
	 * @return int
	 */
	public function count(): int {
		$count = 0;

		/**
		 * @var DiffOp $diffOp
		 */
		foreach ( $this as $diffOp ) {
			$count += $diffOp->count();
		}

		return $count;
	}

	/**
	 * @since 0.3
	 */
	public function removeEmptyOperations() {
		foreach ( $this->getArrayCopy() as $key => $operation ) {
			if ( $operation instanceof self && $operation->isEmpty() ) {
				unset( $this[$key] );
			}
		}
	}

	/**
	 * Returns the value of the isAssociative flag.
	 *
	 * @since 0.4
	 *
	 * @return bool|null
	 */
	public function isAssociative() {
		return $this->isAssociative;
	}

	/**
	 * Returns if the diff looks associative or not.
	 * This first checks the isAssociative flag and in case its null checks
	 * if there are any non-add-non-remove operations.
	 *
	 * @since 0.4
	 *
	 * @return bool
	 */
	public function looksAssociative(): bool {
		return $this->isAssociative === null ? $this->hasAssociativeOperations() : $this->isAssociative;
	}

	/**
	 * Returns if the diff can be non-associative.
	 * This means it does not contain any non-add-non-remove operations.
	 *
	 * @since 0.4
	 *
	 * @return bool
	 */
	public function hasAssociativeOperations(): bool {
		return !empty( $this->typePointers['change'] )
			|| !empty( $this->typePointers['diff'] )
			|| !empty( $this->typePointers['map'] )
			|| !empty( $this->typePointers['list'] );
	}

	/**
	 * Returns the Diff in array form where nested DiffOps are also turned into their array form.
	 *
	 * @see  DiffOp::toArray
	 *
	 * @since 0.5
	 *
	 * @param callable|null $valueConverter optional callback used to convert any
	 *        complex values to arrays.
	 *
	 * @return array
	 */
	public function toArray( callable $valueConverter = null ): array {
		$operations = [];

		foreach ( $this->getOperations() as $key => $diffOp ) {
			$operations[$key] = $diffOp->toArray( $valueConverter );
		}

		return [
			'type' => $this->getType(),
			'isassoc' => $this->isAssociative,
			'operations' => $operations
		];
	}

	/**
	 * @since 2.0
	 *
	 * @param mixed $target
	 *
	 * @return bool
	 */
	public function equals( $target ) {
		if ( $target === $this ) {
			return true;
		}

		if ( !( $target instanceof self ) ) {
			return false;
		}

		return $this->isAssociative === $target->isAssociative
			&& $this->getArrayCopy() == $target->getArrayCopy();
	}

	/**
	 * Finds a new offset for when appending an element.
	 * The base class does this, so it would be better to integrate,
	 * but there does not appear to be any way to do this...
	 *
	 * @return int
	 */
	private function getNewOffset(): int {
		while ( $this->offsetExists( $this->indexOffset ) ) {
			$this->indexOffset++;
		}

		return $this->indexOffset;
	}

	/**
	 * @see ArrayObject::append
	 *
	 * @since 0.1
	 *
	 * @param mixed $value
	 */
	public function append( $value ) {
		$this->setElement( null, $value );
	}

	/**
	 * @see ArrayObject::offsetSet()
	 *
	 * @since 0.1
	 *
	 * @param int|string $index
	 * @param mixed $value
	 */
	public function offsetSet( $index, $value ) {
		$this->setElement( $index, $value );
	}

	/**
	 * Method that actually sets the element and holds
	 * all common code needed for set operations, including
	 * type checking and offset resolving.
	 *
	 * If you want to do additional indexing or have code that
	 * otherwise needs to be executed whenever an element is added,
	 * you can overload @see preSetElement.
	 *
	 * @param int|string|null $index
	 * @param mixed $value
	 *
	 * @throws InvalidArgumentException
	 */
	private function setElement( $index, $value ) {
		if ( !( $value instanceof DiffOp ) ) {
			throw new InvalidArgumentException(
				'Can only add DiffOp implementing objects to ' . get_called_class() . '.'
			);
		}

		if ( $index === null ) {
			$index = $this->getNewOffset();
		}

		if ( $this->preSetElement( $index, $value ) ) {
			parent::offsetSet( $index, $value );
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

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

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

	/**
	 * @see Serializable::serialize
	 *
	 * @since 0.1
	 *
	 * @return string
	 */
	public function serialize() {
		$assoc = $this->isAssociative === null ? 'n' : ( $this->isAssociative ? 't' : 'f' );

		$data = [
			'data' => $this->getArrayCopy(),
			'index' => $this->indexOffset,
			'typePointers' => $this->typePointers,
			'assoc' => $assoc
		];

		return serialize( $data );
	}

	/**
	 * @since 0.1
	 *
	 * @return bool
	 */
	public function isEmpty(): bool {
		/** @var DiffOp $diffOp */
		foreach ( $this as $diffOp ) {
			if ( $diffOp->count() > 0 ) {
				return false;
			}
		}

		return true;
	}

}


1		<?php
2
3		declare( strict_types = 1 );
4
5		namespace Diff\DiffOp\Diff;
6
7		use ArrayObject;
8		use Diff\DiffOp\DiffOp;
9		use Diff\DiffOp\DiffOpAdd;
10		use Diff\DiffOp\DiffOpChange;
11		use Diff\DiffOp\DiffOpRemove;
12		use InvalidArgumentException;
13
14		/**
15		* Base class for diffs. Diffs are collections of DiffOp objects,
16		* and are themselves DiffOp objects as well.
17		*
18		* @since 0.1
19		*
20		* @license BSD-3-Clause
21		* @author Jeroen De Dauw < [email protected] >
22		* @author Daniel Kinzler
23		* @author Thiemo Kreuz
24		*/
25		class Diff extends ArrayObject implements DiffOp {
26
27		/**
28		* @var bool\|null
29		*/
30		private $isAssociative = null;
31
32		/**
33		* Pointers to the operations of certain types for quick lookup.
34		*
35		* @var array[]
36		*/
37		private $typePointers = [
38		'add' => [],
39		'remove' => [],
40		'change' => [],
41		'list' => [],
42		'map' => [],
43		'diff' => [],
44		];
45
46		/**
47		* @var int
48		*/
49		private $indexOffset = 0;
50
51		/**
52		* @since 0.1
53		*
54		* @param DiffOp[] $operations
55		* @param bool\|null $isAssociative
56		*
57		* @throws InvalidArgumentException
58		*/
59	107	public function __construct( array $operations = [], $isAssociative = null ) {
60	107	if ( $isAssociative !== null && !is_bool( $isAssociative ) ) {
61	6	throw new InvalidArgumentException( '$isAssociative should be a boolean or null' );
62		}
63
64	101	parent::__construct( [] );
65
66	101	foreach ( $operations as $offset => $operation ) {
67	66	if ( !( $operation instanceof DiffOp ) ) {
68	4	throw new InvalidArgumentException( 'All elements fed to the Diff constructor should be of type DiffOp' );
69		}
70
71	63	$this->offsetSet( $offset, $operation );
72		}
73
74	97	$this->isAssociative = $isAssociative;
75	97	}
76
77		/**
78		* @since 0.1
79		*
80		* @return DiffOp[]
81		*/
82	122	public function getOperations(): array {
83	122	return $this->getArrayCopy();
84		}
85
86		/**
87		* @since 0.1
88		*
89		* @param string $type
90		*
91		* @return DiffOp[]
92		*/
93	23	public function getTypeOperations( string $type ): array {
94	23	return array_intersect_key(
95	23	$this->getArrayCopy(),
96	23	array_flip( $this->typePointers[$type] )
97		);
98		}
99
100		/**
101		* @since 0.1
102		*
103		* @param DiffOp[] $operations
104		*/
105	7	public function addOperations( array $operations ) {
106	7	foreach ( $operations as $operation ) {
107	5	$this->append( $operation );
108		}
109	7	}
110
111		/**
112		* Gets called before a new element is added to the ArrayObject.
113		*
114		* At this point the index is always set (ie not null) and the
115		* value is always of the type returned by @see getObjectType.
116		*
117		* Should return a boolean. When false is returned the element
118		* does not get added to the ArrayObject.
119		*
120		* @param int\|string $index
121		* @param DiffOp $value
122		*
123		* @return bool
124		* @throws InvalidArgumentException
125		*/
126	86	private function preSetElement( $index, DiffOp $value ): bool {
127	86	if ( $this->isAssociative === false && ( $value->getType() !== 'add' && $value->getType() !== 'remove' ) ) {
128	1	throw new InvalidArgumentException( 'Diff operation with invalid type "' . $value->getType() . '" provided.' );
129		}
130
131	85	if ( array_key_exists( $value->getType(), $this->typePointers ) ) {
132	78	$this->typePointers[$value->getType()][] = $index;
133		}
134		else {
135	7	throw new InvalidArgumentException( 'Diff operation with invalid type "' . $value->getType() . '" provided.' );
136		}
137
138	78	return true;
139		}
140
141		/**
142		* @see Serializable::unserialize
143		*
144		* @since 0.1
145		*
146		* @param string $serialization
147		*/
148	43	public function unserialize( $serialization ) {
149	43	$serializationData = unserialize( $serialization );
150
151	43	foreach ( $serializationData['data'] as $offset => $value ) {
152		// Just set the element, bypassing checks and offset resolving,
153		// as these elements have already gone through this.
154	37	parent::offsetSet( $offset, $value );
		0 ignored issues – show Comprehensibility Bug introduced 2015-12-28 16:16 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`offsetSet()` instead of `unserialize()`). Are you sure this is correct? If so, you might want to change this to `$this->offsetSet()`. 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...
155		}
156
157	43	$this->indexOffset = $serializationData['index'];
158
159	43	$this->typePointers = $serializationData['typePointers'];
160
161	43	if ( array_key_exists( 'assoc', $serializationData ) ) {
162	43	$this->isAssociative = $serializationData['assoc'] === 'n' ? null : $serializationData['assoc'] === 't';
163		}
164	43	}
165
166		/**
167		* @since 0.1
168		*
169		* @return DiffOpAdd[]
170		*/
171	7	public function getAdditions(): array {
172	7	return $this->getTypeOperations( 'add' );
173		}
174
175		/**
176		* @since 0.1
177		*
178		* @return DiffOpRemove[]
179		*/
180	7	public function getRemovals(): array {
181	7	return $this->getTypeOperations( 'remove' );
182		}
183
184		/**
185		* @since 0.1
186		*
187		* @return DiffOpChange[]
188		*/
189	2	public function getChanges(): array {
190	2	return $this->getTypeOperations( 'change' );
191		}
192
193		/**
194		* @since 0.1
195		*
196		* @return array of mixed
197		*/
198	1	public function getAddedValues(): array {
199	1	return array_map(
200	1	function( DiffOpAdd $addition ) {
201	1	return $addition->getNewValue();
202	1	},
203	1	$this->getTypeOperations( 'add' )
204		);
205		}
206
207		/**
208		* @since 0.1
209		*
210		* @return array of mixed
211		*/
212	1	public function getRemovedValues(): array {
213	1	return array_map(
214	1	function( DiffOpRemove $addition ) {
215	1	return $addition->getOldValue();
216	1	},
217	1	$this->getTypeOperations( 'remove' )
218		);
219		}
220
221		/**
222		* @see DiffOp::isAtomic
223		*
224		* @since 0.1
225		*
226		* @return bool
227		*/
228	72	public function isAtomic(): bool {
229	72	return false;
230		}
231
232		/**
233		* @see DiffOp::getType
234		*
235		* @since 0.1
236		*
237		* @return string
238		*/
239	152	public function getType(): string {
240	152	return 'diff';
241		}
242
243		/**
244		* Counts the number of atomic operations in the diff.
245		* This means the size of a diff with as elements only empty diffs will be 0.
246		* Or that the size of a diff with one atomic operation and one diff that itself
247		* holds two atomic operations will be 3.
248		*
249		* @see Countable::count
250		*
251		* @since 0.1
252		*
253		* @return int
254		*/
255	74	public function count(): int {
256	74	$count = 0;
257
258		/**
259		* @var DiffOp $diffOp
260		*/
261	74	foreach ( $this as $diffOp ) {
262	62	$count += $diffOp->count();
263		}
264
265	74	return $count;
266		}
267
268		/**
269		* @since 0.3
270		*/
271	1	public function removeEmptyOperations() {
272	1	foreach ( $this->getArrayCopy() as $key => $operation ) {
273	1	if ( $operation instanceof self && $operation->isEmpty() ) {
274	1	unset( $this[$key] );
275		}
276		}
277	1	}
278
279		/**
280		* Returns the value of the isAssociative flag.
281		*
282		* @since 0.4
283		*
284		* @return bool\|null
285		*/
286	9	public function isAssociative() {
287	9	return $this->isAssociative;
288		}
289
290		/**
291		* Returns if the diff looks associative or not.
292		* This first checks the isAssociative flag and in case its null checks
293		* if there are any non-add-non-remove operations.
294		*
295		* @since 0.4
296		*
297		* @return bool
298		*/
299	9	public function looksAssociative(): bool {
300	9	return $this->isAssociative === null ? $this->hasAssociativeOperations() : $this->isAssociative;
301		}
302
303		/**
304		* Returns if the diff can be non-associative.
305		* This means it does not contain any non-add-non-remove operations.
306		*
307		* @since 0.4
308		*
309		* @return bool
310		*/
311	16	public function hasAssociativeOperations(): bool {
312	16	return !empty( $this->typePointers['change'] )
313	14	\|\| !empty( $this->typePointers['diff'] )
314	12	\|\| !empty( $this->typePointers['map'] )
315	16	\|\| !empty( $this->typePointers['list'] );
316		}
317
318		/**
319		* Returns the Diff in array form where nested DiffOps are also turned into their array form.
320		*
321		* @see DiffOp::toArray
322		*
323		* @since 0.5
324		*
325		* @param callable\|null $valueConverter optional callback used to convert any
326		* complex values to arrays.
327		*
328		* @return array
329		*/
330	108	public function toArray( callable $valueConverter = null ): array {
331	108	$operations = [];
332
333	108	foreach ( $this->getOperations() as $key => $diffOp ) {
334	96	$operations[$key] = $diffOp->toArray( $valueConverter );
335		}
336
337		return [
338	108	'type' => $this->getType(),
339	108	'isassoc' => $this->isAssociative,
340	108	'operations' => $operations
341		];
342		}
343
344		/**
345		* @since 2.0
346		*
347		* @param mixed $target
348		*
349		* @return bool
350		*/
351	12	public function equals( $target ) {
352	12	if ( $target === $this ) {
353	1	return true;
354		}
355
356	11	if ( !( $target instanceof self ) ) {
357	2	return false;
358		}
359
360	9	return $this->isAssociative === $target->isAssociative
361	9	&& $this->getArrayCopy() == $target->getArrayCopy();
362		}
363
364		/**
365		* Finds a new offset for when appending an element.
366		* The base class does this, so it would be better to integrate,
367		* but there does not appear to be any way to do this...
368		*
369		* @return int
370		*/
371	23	private function getNewOffset(): int {
372	23	while ( $this->offsetExists( $this->indexOffset ) ) {
373	13	$this->indexOffset++;
374		}
375
376	23	return $this->indexOffset;
377		}
378
379		/**
380		* @see ArrayObject::append
381		*
382		* @since 0.1
383		*
384		* @param mixed $value
385		*/
386	19	public function append( $value ) {
387	19	$this->setElement( null, $value );
388	10	}
389
390		/**
391		* @see ArrayObject::offsetSet()
392		*
393		* @since 0.1
394		*
395		* @param int\|string $index
396		* @param mixed $value
397		*/
398	74	public function offsetSet( $index, $value ) {
399	74	$this->setElement( $index, $value );
400	73	}
401
402		/**
403		* Method that actually sets the element and holds
404		* all common code needed for set operations, including
405		* type checking and offset resolving.
406		*
407		* If you want to do additional indexing or have code that
408		* otherwise needs to be executed whenever an element is added,
409		* you can overload @see preSetElement.
410		*
411		* @param int\|string\|null $index
412		* @param mixed $value
413		*
414		* @throws InvalidArgumentException
415		*/
416	88	private function setElement( $index, $value ) {
417	88	if ( !( $value instanceof DiffOp ) ) {
418	12	throw new InvalidArgumentException(
419	12	'Can only add DiffOp implementing objects to ' . get_called_class() . '.'
420		);
421		}
422
423	86	if ( $index === null ) {
424	23	$index = $this->getNewOffset();
425		}
426
427	86	if ( $this->preSetElement( $index, $value ) ) {
428	78	parent::offsetSet( $index, $value );
		0 ignored issues – show Comprehensibility Bug introduced 2015-12-28 16:16 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`offsetSet()` instead of `setElement()`). Are you sure this is correct? If so, you might want to change this to `$this->offsetSet()`. 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...
429		}
430	78	}
431
432		/**
433		* @see Serializable::serialize
434		*
435		* @since 0.1
436		*
437		* @return string
438		*/
439	43	public function serialize() {
440	43	$assoc = $this->isAssociative === null ? 'n' : ( $this->isAssociative ? 't' : 'f' );
441
442		$data = [
443	43	'data' => $this->getArrayCopy(),
444	43	'index' => $this->indexOffset,
445	43	'typePointers' => $this->typePointers,
446	43	'assoc' => $assoc
447		];
448
449	43	return serialize( $data );
450		}
451
452		/**
453		* @since 0.1
454		*
455		* @return bool
456		*/
457	15	public function isEmpty(): bool {
458		/** @var DiffOp $diffOp */
459	15	foreach ( $this as $diffOp ) {
460	11	if ( $diffOp->count() > 0 ) {
461	11	return false;
462		}
463		}
464
465	7	return true;
466		}
467
468		}
469

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