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Completed

Push — master ( 72d462...18bdd2 )

by Pol

created 2017-08-15 21:35 UTC

Prime::valid() A

↳ Parent: Prime

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	0
cts	4
cp	0
rs	10
c	0
b	0
f	0
cc	1
eloc	2
nc	1
nop	0
crap	2

<?php

namespace drupol\phpermutations\Iterators;

use drupol\phpermutations\Combinatorics;

/**
 * Class Prime.
 *
 * @package drupol\phpermutations\Iterators
 */
class Prime extends Combinatorics implements \Iterator, \Countable
{
    /**
     * The minimum limit.
     *
     * @var int
     */
    protected $min;

    /**
     * The maximum limit.
     *
     * @var int
     */
    protected $max;

    /**
     * The key.
     *
     * @var int
     */
    protected $key;

    /**
     * Prime constructor.
     */
    public function __construct()
    {
        $this->setMaxLimit(PHP_INT_MAX);
        $this->setMinLimit(0);
    }

    /**
     * {@inheritdoc}
     */
    public function current()

    {
        for ($i = $this->key(); $i < $this->getMaxLimit(); $i++) {
            if ($this->isPrimeNumber($i)) {
                $this->key = $i;

                return $i;
            }
        }

        return $this->getMaxLimit();
    }

    /**
     * {@inheritdoc}
     */
    public function next()
    {
        $this->key++;
    }

    /**
     * {@inheritdoc}
     */
    public function key()
    {
        return $this->key;
    }

    /**
     * {@inheritdoc}
     */
    public function valid()
    {
        return $this->current() < $this->getMaxLimit();
    }

    /**
     * {@inheritdoc}
     */
    public function rewind()
    {
        $this->key = $this->getMinLimit();
    }

    /**
     * Count elements of an object.
     *
     * @return int
     *   The number of element.
     */
    public function count()
    {
        return count($this->toArray());
    }

    /**
     * Convert the iterator into an array.
     *
     * @return array
     *   The elements.
     */
    public function toArray()
    {
        $data = [];

        for ($this->rewind(); $this->valid(); $this->next()) {
            $data[] = $this->current();
        }

        return $data;
    }

    /**
     * Set the maximum limit.
     *
     * @param int $max
     *   The limit.
     */
    public function setMaxLimit($max)
    {
        $this->max = $max;
    }

    /**
     * Get the maximum limit.
     *
     * @return int
     *   The limit.
     */
    public function getMaxLimit()
    {
        return intval($this->max);
    }

    /**
     * Set the minimum limit.
     *
     * @param int $min
     *   The limit.
     */
    public function setMinLimit($min)
    {
        $this->min = $min;
    }

    /**
     * Get the minimum limit.
     *
     * @return int
     *   The limit.
     */
    public function getMinLimit()
    {
        return $this->min <= 2 ? 2 : intval($this->min);
    }

    /**
     * Test if a number is prime or not.
     *
     * @param int $number
     *   The number to test.
     *
     * @return bool
     *   The true if the number is prime, false otherwise.
     */
    protected function isPrimeNumber($number)
    {
        $number = abs($number);

        // 2 is an exception.
        if (2 === $number) {
            return true;
        }

        // Check if number is even.
        if (!($number & 1)) {
            return false;
        }

        $sqrtNumber = sqrt($number);
        for ($divisor = 3; $divisor <= $sqrtNumber; $divisor += 2) {
            if ($number % $divisor === 0) {
                return false;
            }
        }

        return true;
    }
}


1		<?php
2
3		namespace drupol\phpermutations\Iterators;
4
5		use drupol\phpermutations\Combinatorics;
6
7		/**
8		* Class Prime.
9		*
10		* @package drupol\phpermutations\Iterators
11		*/
12		class Prime extends Combinatorics implements \Iterator, \Countable
13		{
14		/**
15		* The minimum limit.
16		*
17		* @var int
18		*/
19		protected $min;
20
21		/**
22		* The maximum limit.
23		*
24		* @var int
25		*/
26		protected $max;
27
28		/**
29		* The key.
30		*
31		* @var int
32		*/
33		protected $key;
34
35		/**
36		* Prime constructor.
37		*/
38		public function __construct()
39		{
40		$this->setMaxLimit(PHP_INT_MAX);
41		$this->setMinLimit(0);
42		}
43
44		/**
45		* {@inheritdoc}
46		*/
47	View Code Duplication	public function current()
		0 ignored issues – show Duplication introduced 2017-08-15 18:29 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
48		{
49		for ($i = $this->key(); $i < $this->getMaxLimit(); $i++) {
50		if ($this->isPrimeNumber($i)) {
51		$this->key = $i;
52
53		return $i;
54		}
55		}
56
57		return $this->getMaxLimit();
58		}
59
60		/**
61		* {@inheritdoc}
62		*/
63		public function next()
64		{
65		$this->key++;
66		}
67
68		/**
69		* {@inheritdoc}
70		*/
71		public function key()
72		{
73		return $this->key;
74		}
75
76		/**
77		* {@inheritdoc}
78		*/
79		public function valid()
80		{
81		return $this->current() < $this->getMaxLimit();
82		}
83
84		/**
85		* {@inheritdoc}
86		*/
87		public function rewind()
88		{
89		$this->key = $this->getMinLimit();
90		}
91
92		/**
93		* Count elements of an object.
94		*
95		* @return int
96		* The number of element.
97		*/
98		public function count()
99		{
100		return count($this->toArray());
101		}
102
103		/**
104		* Convert the iterator into an array.
105		*
106		* @return array
107		* The elements.
108		*/
109		public function toArray()
110		{
111		$data = [];
112
113		for ($this->rewind(); $this->valid(); $this->next()) {
114		$data[] = $this->current();
115		}
116
117		return $data;
118		}
119
120		/**
121		* Set the maximum limit.
122		*
123		* @param int $max
124		* The limit.
125		*/
126		public function setMaxLimit($max)
127		{
128		$this->max = $max;
129		}
130
131		/**
132		* Get the maximum limit.
133		*
134		* @return int
135		* The limit.
136		*/
137		public function getMaxLimit()
138		{
139		return intval($this->max);
140		}
141
142		/**
143		* Set the minimum limit.
144		*
145		* @param int $min
146		* The limit.
147		*/
148		public function setMinLimit($min)
149		{
150		$this->min = $min;
151		}
152
153		/**
154		* Get the minimum limit.
155		*
156		* @return int
157		* The limit.
158		*/
159		public function getMinLimit()
160		{
161		return $this->min <= 2 ? 2 : intval($this->min);
162		}
163
164		/**
165		* Test if a number is prime or not.
166		*
167		* @param int $number
168		* The number to test.
169		*
170		* @return bool
171		* The true if the number is prime, false otherwise.
172		*/
173		protected function isPrimeNumber($number)
174		{
175		$number = abs($number);
176
177		// 2 is an exception.
178		if (2 === $number) {
179		return true;
180		}
181
182		// Check if number is even.
183		if (!($number & 1)) {
184		return false;
185		}
186
187		$sqrtNumber = sqrt($number);
188		for ($divisor = 3; $divisor <= $sqrtNumber; $divisor += 2) {
189		if ($number % $divisor === 0) {
190		return false;
191		}
192		}
193
194		return true;
195		}
196		}
197

drupol / phpermutations

Push — master ( 72d462...18bdd2 )

Prime::valid() A

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