ArrayList::empty() - Code Metrics - Inspection of "Fixed contains method in circular linked list" - SiroDiaz/DataStructures - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 930afd...b056f8 )

by Siro Díaz

created 2017-07-13 14:40 UTC

ArrayList::empty() A

↳ Parent: ArrayList

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	3
rs	10
c	0
b	0
f	0
cc	1
eloc	2
nc	1
nop	0

<?php
/**
 * DataStructures for PHP
 *
 * @link      https://github.com/SiroDiaz/DataStructures
 * @copyright Copyright (c) 2017 Siro Díaz Palazón
 * @license   https://github.com/SiroDiaz/DataStructures/blob/master/README.md (MIT License)
 */
namespace DataStructures\Lists;

use DataStructures\Lists\Interfaces\ListInterface;
use DataStructures\Lists\Traits\{CountTrait, ArrayAccessTrait};
use OutOfBoundsException;

/**
 * ArrayList
 *
 * This class is an implementation of a list based in native arrays.
 * The access time is, in general, O(1) since all in PHP is a hash table.
 *
 * @author Siro Diaz Palazon <[email protected]>
 */
class ArrayList implements ListInterface {
    use ArrayAccessTrait;

    private $data;
    private $current;
    private $position;
    private $size;

    public function __construct() {
        $this->data = [];
        $this->size = 0;
        $this->position = 0;
    }

    /**
     * Add a new node in the specified index.
     *
     * @param integer $index the position.
     * @param mixed $data the data to be stored.
     */
    public function insert($index, $data) {
        array_splice($this->data, $index, 0, $data);
        $this->size++;
    }
    
    /**
     * Removes all the array items.
     */
    public function clear() {
        $this->data = [];
        $this->size = 0;
    }
    
     /**
     * Returns the array in the especified index.
     *
     * @param integer $index Index that must be greater than 0
     *  and lower than the list size.
     * @return mixed The data stored in the given index
     * @throws OutOfBoundsException if index is out bounds.
     */
    public function get($index) {
        if($index < 0 || $index > $this->size - 1) {
            throw new OutOfBoundsException();
        }

        return $this->data[$index];
    }

    /**
     * Returns the last node with O(1).
     *
     * @return mixed null if the array is empty.
     */
    public function getLast() {
        if(!$this->empty()) {
            return $this->data[$this->size - 1];
        }
        
        return null;
    }

    public function getAll() {
        foreach($this->data as $data) {
            yield $data;
        }
    }
    
    /**
     * Removes and returns the last item in the array.
     *
     * @return mixed data in node.
     */
    public function pop() {
        return $this->delete(($this->size === 0) ? 0 : $this->size - 1);
    }

    /**
     * Adds at the end of the list new node containing
     * the data to be stored.
     *
     * @param mixed $data The data
     */
    public function push($data) {
        $this->data[] = $data;
        $this->size++;
    }

    /**
     *
     */
    public function contains($data) : bool {
        return in_array($data, $this->data);
    }

    /**
     *
     */
    public function indexOf($data) {
        return array_search($data, $this->data, true);
    }

    /**
     *
     */
    public function lastIndexOf($data) {
        for($i = $this->size - 1; $i >= 0; $i--) {
            if($this->data[$i] === $data) {
                return $i;
            }
        }

        return false;
    }

    /**
     *
     */
    public function remove($data) {
        $i = 0;
        
        while($i < $this->size) {
            if($this->data[$i] === $data) {
                $aux = $this->data[$i];
                array_splice($this->data, $i, 1);
                
                return $aux;
            }

            $i++;
        }

        return null;
    }

    /**
     * Adds at the beginning a node in the list.
     *
     * @param mixed $data
     * @return mixed the data stored.
     */
    public function unshift($data) {
        $this->insert(0, $data);
    }

    /**
     * Delete a node in the given position and returns it back.
     *
     * @param integer $index the position.
     * @throws OutOfBoundsException if index is negative
     *  or is greater than the size of the list.
     */
    public function delete($index) {
        if($this->size === 0 || $index < 0 || $index > $this->size - 1) {
            throw new OutOfBoundsException();
        }
        
        $data = $this->data[$index];
        array_splice($this->data, $index, 1);
        $this->size--;

        return $data;
    }
    
    /**
     * Deletes the first node of the list and returns it.
     *
     * @return mixed the data.
     */
    public function shift() {
        return $this->delete(0);
    }

    /**
     * Returns array stored in the data attribute.
     *
     * @return array data stored in all nodes.
     */
    public function toArray() : array {
        return $this->data;
    }

    /**
     * Reset the cursor position.
     */
    public function rewind() {
        $this->position = 0;
        $this->current = $this->data[$this->position];
    }

    /**
     * Returns the current node data.
     *
     * @return mixed
     */
    public function current() {
        return $this->current;
    }

    /**
     * Key or index that indicates the cursor position.
     *
     * @return integer The current position.
     */
    public function key() {
        return $this->position;
    }

    /**
     * Move the cursor to the next node and increments the
     * position counter.
     */
    public function next() {
        ++$this->position;
        $this->current = $this->data[$this->position];
    }

    /**
     * Returns if the current pointer position is valid.
     *
     * @return boolean true if pointer is not last, else false.
     */
    public function valid() {
        return $this->position < $this->size;
    }

    /**
     * Binds to count() method. This is equal to make $this->tree->size().
     *
     * @return integer the tree size. 0 if it is empty.
     */
    public function count() {
        return $this->size;
    }

    /**
     * Returns the array size.
     *
     * @return int the length
     */
    public function size() : int {
        return $this->size;
    }

    /**
     * Checks if the list is empty.
     *
     * @return boolean true if is empty, else false.
     */
    public function empty() : bool {
        return $this->size === 0;
    }
}

1			<?php
2			/**
3			* DataStructures for PHP
4			*
5			* @link https://github.com/SiroDiaz/DataStructures
6			* @copyright Copyright (c) 2017 Siro Díaz Palazón
7			* @license https://github.com/SiroDiaz/DataStructures/blob/master/README.md (MIT License)
8			*/
9			namespace DataStructures\Lists;
10
11			use DataStructures\Lists\Interfaces\ListInterface;
12			use DataStructures\Lists\Traits\{CountTrait, ArrayAccessTrait};
13			use OutOfBoundsException;
14
15			/**
16			* ArrayList
17			*
18			* This class is an implementation of a list based in native arrays.
19			* The access time is, in general, O(1) since all in PHP is a hash table.
20			*
21			* @author Siro Diaz Palazon <[email protected]>
22			*/
23			class ArrayList implements ListInterface {
24			use ArrayAccessTrait;
25
26			private $data;
27			private $current;
28			private $position;
29			private $size;
30
31			public function __construct() {
32			$this->data = [];
33			$this->size = 0;
34			$this->position = 0;
35			}
36
37			/**
38			* Add a new node in the specified index.
39			*
40			* @param integer $index the position.
41			* @param mixed $data the data to be stored.
42			*/
43			public function insert($index, $data) {
44			array_splice($this->data, $index, 0, $data);
45			$this->size++;
46			}
47
48			/**
49			* Removes all the array items.
50			*/
51			public function clear() {
52			$this->data = [];
53			$this->size = 0;
54			}
55
56			/**
57			* Returns the array in the especified index.
58			*
59			* @param integer $index Index that must be greater than 0
60			* and lower than the list size.
61			* @return mixed The data stored in the given index
62			* @throws OutOfBoundsException if index is out bounds.
63			*/
64			public function get($index) {
65			if($index < 0 \|\| $index > $this->size - 1) {
66			throw new OutOfBoundsException();
67			}
68
69			return $this->data[$index];
70			}
71
72			/**
73			* Returns the last node with O(1).
74			*
75			* @return mixed null if the array is empty.
76			*/
77			public function getLast() {
78			if(!$this->empty()) {
79			return $this->data[$this->size - 1];
80			}
81
82			return null;
83			}
84
85			public function getAll() {
86			foreach($this->data as $data) {
87			yield $data;
88			}
89			}
90
91			/**
92			* Removes and returns the last item in the array.
93			*
94			* @return mixed data in node.
95			*/
96			public function pop() {
97			return $this->delete(($this->size === 0) ? 0 : $this->size - 1);
98			}
99
100			/**
101			* Adds at the end of the list new node containing
102			* the data to be stored.
103			*
104			* @param mixed $data The data
105			*/
106			public function push($data) {
107			$this->data[] = $data;
108			$this->size++;
109			}
110
111			/**
112			*
113			*/
114			public function contains($data) : bool {
115			return in_array($data, $this->data);
116			}
117
118			/**
119			*
120			*/
121			public function indexOf($data) {
122			return array_search($data, $this->data, true);
123			}
124
125			/**
126			*
127			*/
128			public function lastIndexOf($data) {
129			for($i = $this->size - 1; $i >= 0; $i--) {
130			if($this->data[$i] === $data) {
131			return $i;
132			}
133			}
134
135			return false;
136			}
137
138			/**
139			*
140			*/
141			public function remove($data) {
142			$i = 0;
143
144			while($i < $this->size) {
145			if($this->data[$i] === $data) {
146			$aux = $this->data[$i];
147			array_splice($this->data, $i, 1);
148
149			return $aux;
150			}
151
152			$i++;
153			}
154
155			return null;
156			}
157
158			/**
159			* Adds at the beginning a node in the list.
160			*
161			* @param mixed $data
162			* @return mixed the data stored.
163			*/
164			public function unshift($data) {
165			$this->insert(0, $data);
166			}
167
168			/**
169			* Delete a node in the given position and returns it back.
170			*
171			* @param integer $index the position.
172			* @throws OutOfBoundsException if index is negative
173			* or is greater than the size of the list.
174			*/
175			public function delete($index) {
176			if($this->size === 0 \|\| $index < 0 \|\| $index > $this->size - 1) {
177			throw new OutOfBoundsException();
178			}
179
180			$data = $this->data[$index];
181			array_splice($this->data, $index, 1);
182			$this->size--;
183
184			return $data;
185			}
186
187			/**
188			* Deletes the first node of the list and returns it.
189			*
190			* @return mixed the data.
191			*/
192			public function shift() {
193			return $this->delete(0);
194			}
195
196			/**
197			* Returns array stored in the data attribute.
198			*
199			* @return array data stored in all nodes.
200			*/
201			public function toArray() : array {
202			return $this->data;
203			}
204
205			/**
206			* Reset the cursor position.
207			*/
208			public function rewind() {
209			$this->position = 0;
210			$this->current = $this->data[$this->position];
211			}
212
213			/**
214			* Returns the current node data.
215			*
216			* @return mixed
217			*/
218			public function current() {
219			return $this->current;
220			}
221
222			/**
223			* Key or index that indicates the cursor position.
224			*
225			* @return integer The current position.
226			*/
227			public function key() {
228			return $this->position;
229			}
230
231			/**
232			* Move the cursor to the next node and increments the
233			* position counter.
234			*/
235			public function next() {
236			++$this->position;
237			$this->current = $this->data[$this->position];
238			}
239
240			/**
241			* Returns if the current pointer position is valid.
242			*
243			* @return boolean true if pointer is not last, else false.
244			*/
245			public function valid() {
246			return $this->position < $this->size;
247			}
248
249			/**
250			* Binds to count() method. This is equal to make $this->tree->size().
251			*
252			* @return integer the tree size. 0 if it is empty.
253			*/
254			public function count() {
255			return $this->size;
256			}
257
258			/**
259			* Returns the array size.
260			*
261			* @return int the length
262			*/
263			public function size() : int {
264			return $this->size;
265			}
266
267			/**
268			* Checks if the list is empty.
269			*
270			* @return boolean true if is empty, else false.
271			*/
272			public function empty() : bool {
273			return $this->size === 0;
274			}
275			}

SiroDiaz / DataStructures

Push — master ( 930afd...b056f8 )

ArrayList::empty() A

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