Combinations::generator() - Code Metrics - Inspection of "#7: Update code syntax and add more checks with Gr..." - drupol/phpermutations - Measure and Improve Code Quality continuously with Scrutinizer

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by Pol

created 2017-08-15 21:55 UTC

Combinations::generator() A

↳ Parent: Combinations

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

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

<?php

namespace drupol\phpermutations\Generators;

use drupol\phpermutations\Iterators\Combinations as CombinationsIterator;

/**
 * Class Combinations.
 *
 * @package drupol\phpermutations\Generators
 *
 * @author Mark Wilson <[email protected]>
 */
class Combinations extends CombinationsIterator
{
    /**
     * Alias of the get() method.
     *
     * @return \Generator
     *   The prime generator.
     */
    public function generator()
    {
        return $this->get($this->getDataset(), $this->getLength());
    }

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

        foreach ($this->generator() as $value) {
            $data[] = $value;
        }

        return $data;
    }

    /**
     * The generator.
     *
     * @param array $dataset
     *   The dataset.
     * @param int $length
     *   The length.
     *
     * @codingStandardsIgnoreStart
     * @return \Generator
     * @codingStandardsIgnoreEnd
     */
    protected function get(array $dataset, $length)
    {
        $originalLength = count($dataset);
        $remainingLength = $originalLength - $length + 1;
        for ($i = 0; $i < $remainingLength; $i++) {
            $current = $dataset[$i];
            if ($length === 1) {
                yield [$current];
            } else {
                $remaining = array_slice($dataset, $i + 1);
                foreach ($this->get($remaining, $length - 1) as $permutation) {
                    array_unshift($permutation, $current);
                    yield $permutation;
                }
            }
        }
    }
}


1		<?php
2
3		namespace drupol\phpermutations\Generators;
4
5		use drupol\phpermutations\Iterators\Combinations as CombinationsIterator;
6
7		/**
8		* Class Combinations.
9		*
10		* @package drupol\phpermutations\Generators
11		*
12		* @author Mark Wilson <[email protected]>
13		*/
14		class Combinations extends CombinationsIterator
15		{
16		/**
17		* Alias of the get() method.
18		*
19		* @return \Generator
20		* The prime generator.
21		*/
22	6	public function generator()
23		{
24	6	return $this->get($this->getDataset(), $this->getLength());
25		}
26
27		/**
28		* Convert the generator into an array.
29		*
30		* @return array
31		* The elements.
32		*/
33	4	public function toArray()
34		{
35	4	$data = [];
36
37	4	foreach ($this->generator() as $value) {
38	4	$data[] = $value;
39	4	}
40
41	4	return $data;
42		}
43
44		/**
45		* The generator.
46		*
47		* @param array $dataset
48		* The dataset.
49		* @param int $length
50		* The length.
51		*
52		* @codingStandardsIgnoreStart
53		* @return \Generator
54		* @codingStandardsIgnoreEnd
55		*/
56	6	protected function get(array $dataset, $length)
57		{
58	6	$originalLength = count($dataset);
59	6	$remainingLength = $originalLength - $length + 1;
60	6	for ($i = 0; $i < $remainingLength; $i++) {
61	6	$current = $dataset[$i];
62	6	if ($length === 1) {
63	6	yield [$current];
64	6	} else {
65	6	$remaining = array_slice($dataset, $i + 1);
66	6	foreach ($this->get($remaining, $length - 1) as $permutation) {
67	6	array_unshift($permutation, $current);
68	6	yield $permutation;
69	6	}
70		}
71	6	}
72	6	}
73		}
74

drupol / phpermutations

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Combinations::generator() A

Complexity

Size

Duplication

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