DoublyLinkedList::count() - Code Metrics - Inspection of "Add DoublyLikedList class" - MBHFramework/structures - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — 1.x ( 09aaed...cb25d4 )

by Ulises Jeremias

created 2017-12-24 04:52 UTC

DoublyLinkedList::count() A

↳ Parent: DoublyLinkedList

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	1
nc	1
nop	0
dl	0
loc	3
rs	10
c	0
b	0
f	0

<?php namespace Mbh\Collection;

/**
 * MBHFramework
 *
 * @link      https://github.com/MBHFramework/mbh-framework
 * @copyright Copyright (c) 2017 Ulises Jeremias Cornejo Fandos
 * @license   https://github.com/MBHFramework/mbh-framework/blob/master/LICENSE (MIT License)
 */

use Mbh\Collection\Interfaces\Collection as CollectionInterface;
use Traversable;
use ArrayAccess;
use IteratorAggregate;
use Error;
use OutOfBoundsException;

/**
 * A Doubly Linked List (DLL) is a list of nodes linked in both directions
 * to each other. Iterator's operations, access to both ends, addition or
 * removal of nodes have a cost of O(1) when the underlying structure is a DLL.
 * It hence provides a decent implementation for stacks and queues.
 *
 * @package structures
 * @author Ulises Jeremias Cornejo Fandos <[email protected]>
 */

abstract class DoublyLinkedList implements ArrayAccess, CollectionInterface, IteratorAggregate
{
    use Traits\Collection;

    const MIN_CAPACITY = 8;

    /**
     * @var Deque internal deque to store values.
     */
    protected $deque;

    /**
     * Creates an instance using the values of an array or Traversable object.
     *
     * @param array|Traversable $values
     */
    public function __construct($values = [])
    {
        $this->deque = Deque::fromArray([]);

        $this->pushAll($values);
    }

    /**
     * Ensures that enough memory is allocated for a specified capacity. This
     * potentially reduces the number of reallocations as the size increases.
     *
     * @param int $capacity The number of values for which capacity should be
     *                      allocated. Capacity will stay the same if this value
     *                      is less than or equal to the current capacity.
     */
    public function allocate(int $capacity)
    {
        $this->deque->allocate($capacity);
    }

    /**
     * Returns the current capacity of the queue.
     *
     * @return int
     */
    public function capacity(): int
    {
        return $this->deque->capacity();
    }

    /**
     * @inheritDoc
     */
    public function clear()
    {
        $this->deque->clear();
    }

    /**
     * @inheritDoc
     */
    public function copy()
    {
        return new self($this->deque);
    }

    /**
     * @inheritDoc
     */
    public function count(): int
    {
        return count($this->deque);
    }

    /**
     * Returns the value at the front of the queue without removing it.
     *
     * @return
     */
    abstract public function peek();

    /**
     * Returns and removes the value at the front of the Queue.
     *
     * @return mixed
     */
    abstract public function pop();

    /**
     * Pushes zero or more values into the front of the queue.
     *
     * @param mixed ...$values
     */
    public function push(...$values)
    {
        $this->deque->push(...$values);
    }

    /**
     * Creates associations for all keys and corresponding values of either an
     * array or iterable object.
     *
     * @param Traversable|array $values
     */
    protected function pushAll($values)
    {
        foreach ($values as &$value) {
            $this[] = $value;
        }
    }

    /**
     * @inheritDoc
     */
    public function toArray(): array
    {
        return $this->deque->toArray();
    }

    /**
     * @inheritDoc
     */
    public function unserialize($values)
    {
        $values = unserialize($values);
        $this->deque = Deque::fromArray($values);
    }

    /**
     *
     */
    public function getIterator()
    {
        while (!$this->isEmpty()) {
            yield $this->pop();
        }
    }

    /**
     * @inheritdoc
     *
     * @throws OutOfBoundsException
     */
    public function offsetSet($offset, $value)
    {
        if ($offset === null) {
            $this->push($value);
        } else {
            throw new OutOfBoundsException();
        }
    }

    /**
     * @inheritdoc
     *
     * @throws Error
     */
    public function offsetGet($offset)
    {
        throw new Error();
    }

    /**
     * @inheritdoc
     *
     * @throws Error
     */
    public function offsetUnset($offset)
    {
        throw new Error();
    }

    /**
     * @inheritdoc
     *
     * @throws Error
     */
    public function offsetExists($offset)
    {
        throw new Error();
    }
}


1			<?php namespace Mbh\Collection;
2
3			/**
4			* MBHFramework
5			*
6			* @link https://github.com/MBHFramework/mbh-framework
7			* @copyright Copyright (c) 2017 Ulises Jeremias Cornejo Fandos
8			* @license https://github.com/MBHFramework/mbh-framework/blob/master/LICENSE (MIT License)
9			*/
10
11			use Mbh\Collection\Interfaces\Collection as CollectionInterface;
12			use Traversable;
13			use ArrayAccess;
14			use IteratorAggregate;
15			use Error;
16			use OutOfBoundsException;
17
18			/**
19			* A Doubly Linked List (DLL) is a list of nodes linked in both directions
20			* to each other. Iterator's operations, access to both ends, addition or
21			* removal of nodes have a cost of O(1) when the underlying structure is a DLL.
22			* It hence provides a decent implementation for stacks and queues.
23			*
24			* @package structures
25			* @author Ulises Jeremias Cornejo Fandos <[email protected]>
26			*/
27
28			abstract class DoublyLinkedList implements ArrayAccess, CollectionInterface, IteratorAggregate
29			{
30			use Traits\Collection;
31
32			const MIN_CAPACITY = 8;
33
34			/**
35			* @var Deque internal deque to store values.
36			*/
37			protected $deque;
38
39			/**
40			* Creates an instance using the values of an array or Traversable object.
41			*
42			* @param array\|Traversable $values
43			*/
44			public function __construct($values = [])
45			{
46			$this->deque = Deque::fromArray([]);
47
48			$this->pushAll($values);
49			}
50
51			/**
52			* Ensures that enough memory is allocated for a specified capacity. This
53			* potentially reduces the number of reallocations as the size increases.
54			*
55			* @param int $capacity The number of values for which capacity should be
56			* allocated. Capacity will stay the same if this value
57			* is less than or equal to the current capacity.
58			*/
59			public function allocate(int $capacity)
60			{
61			$this->deque->allocate($capacity);
62			}
63
64			/**
65			* Returns the current capacity of the queue.
66			*
67			* @return int
68			*/
69			public function capacity(): int
70			{
71			return $this->deque->capacity();
72			}
73
74			/**
75			* @inheritDoc
76			*/
77			public function clear()
78			{
79			$this->deque->clear();
80			}
81
82			/**
83			* @inheritDoc
84			*/
85			public function copy()
86			{
87			return new self($this->deque);
88			}
89
90			/**
91			* @inheritDoc
92			*/
93			public function count(): int
94			{
95			return count($this->deque);
96			}
97
98			/**
99			* Returns the value at the front of the queue without removing it.
100			*
101			* @return
102			*/
103			abstract public function peek();
104
105			/**
106			* Returns and removes the value at the front of the Queue.
107			*
108			* @return mixed
109			*/
110			abstract public function pop();
111
112			/**
113			* Pushes zero or more values into the front of the queue.
114			*
115			* @param mixed ...$values
116			*/
117			public function push(...$values)
118			{
119			$this->deque->push(...$values);
120			}
121
122			/**
123			* Creates associations for all keys and corresponding values of either an
124			* array or iterable object.
125			*
126			* @param Traversable\|array $values
127			*/
128			protected function pushAll($values)
129			{
130			foreach ($values as &$value) {
131			$this[] = $value;
132			}
133			}
134
135			/**
136			* @inheritDoc
137			*/
138			public function toArray(): array
139			{
140			return $this->deque->toArray();
141			}
142
143			/**
144			* @inheritDoc
145			*/
146			public function unserialize($values)
147			{
148			$values = unserialize($values);
149			$this->deque = Deque::fromArray($values);
150			}
151
152			/**
153			*
154			*/
155			public function getIterator()
156			{
157			while (!$this->isEmpty()) {
158			yield $this->pop();
159			}
160			}
161
162			/**
163			* @inheritdoc
164			*
165			* @throws OutOfBoundsException
166			*/
167			public function offsetSet($offset, $value)
168			{
169			if ($offset === null) {
170			$this->push($value);
171			} else {
172			throw new OutOfBoundsException();
173			}
174			}
175
176			/**
177			* @inheritdoc
178			*
179			* @throws Error
180			*/
181			public function offsetGet($offset)
182			{
183			throw new Error();
184			}
185
186			/**
187			* @inheritdoc
188			*
189			* @throws Error
190			*/
191			public function offsetUnset($offset)
192			{
193			throw new Error();
194			}
195
196			/**
197			* @inheritdoc
198			*
199			* @throws Error
200			*/
201			public function offsetExists($offset)
202			{
203			throw new Error();
204			}
205			}
206

MBHFramework / structures

Push — 1.x ( 09aaed...cb25d4 )

DoublyLinkedList::count() A

Complexity

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Duplication

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