Permutations::generator() - Code Metrics - Inspection of "Initial commit." - drupol/phpermutations - Measure and Improve Code Quality continuously with Scrutinizer

Completed

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by Pol

created 2016-12-21 16:57 UTC

Permutations::generator() A

↳ Parent: Permutations

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	2

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
eloc	2
nc	1
nop	0
crap	1

<?php

namespace drupol\phpermutations;

/**
 * Class Permutations.
 *
 * @package drupol\phpermutations
 */
class Permutations extends Combinatorics {

  /**
   * Permutations constructor.
   *
   * @param array $dataset
   * @param int $length

   */
  public function __construct(array $dataset = array(), $length = NULL) {

    parent::__construct($dataset, $length);

  }

  /**
   * @return int
   */
  public function count() {
    return $this->fact(count($this->getDataset()))/$this->fact(count($this->getDataset()) - $this->getLength());
  }

  /**
   * @return array
   */
  public function generator() {
    return $this->permute($this->getDataset(), array());
  }

  /**
   * @param $items
   * @param array $perms
   *
   * @return array
   */
  protected function permute($items, $perms = array( )) {
    $result = array();

    foreach (new Combinations($items, $this->getLength()) as $dataset) {
      if (empty($dataset)) {
        $return = array($perms);
      }  else {
        $return = array();
        $datasetCount = count($dataset) - 1;
        for ($i = $datasetCount; $i >= 0; --$i) {
          $newitems = $dataset;
          $newperms = $perms;
          list($foo) = array_splice($newitems, $i, 1);
          array_unshift($newperms, $foo);
          $return = array_merge($return, $this->permute($newitems, $newperms));
        }
      }
      $result = array_merge($result, $return);
    }

    return $result;
  }

  /**
   * @return array
   */
  public function toArray() {
    $results = array();

    foreach($this->generator() as $value) {

      $results[] = $value;
    }

    return $results;
  }

}


1		<?php
2
3		namespace drupol\phpermutations;
4
5		/**
6		* Class Permutations.
7		*
8		* @package drupol\phpermutations
9		*/
10		class Permutations extends Combinatorics {
11
12		/**
13		* Permutations constructor.
14		*
15		* @param array $dataset
16		* @param int $length
		0 ignored issues – show Documentation introduced 2016-12-21 10:11 UTC by Report Bug Copy Issue Report Should the type for parameter `$length` not be `integer\|null`? This check looks for `@param` annotations where the type inferred by our type inference engine differs from the declared type. It makes a suggestion as to what type it considers more descriptive. Most often this is a case of a parameter that can be null in addition to its declared types. Loading history...
17		*/
18	3	public function __construct(array $dataset = array(), $length = NULL) {
		1 ignored issue – show Coding Style introduced 2016-12-19 21:05 UTC by Report Bug Copy Issue Report `TRUE`, `FALSE` and `NULL` must be lowercase; expected `null`, but found `NULL`. Loading history...
19	3	parent::__construct($dataset, $length);
		0 ignored issues – show Bug introduced 2016-12-21 16:59 UTC by Report Bug Copy Issue Report It seems like `$length` defined by parameter `$length` on line 18 can also be of type `integer`; however, `drupol\phpermutations\Combinatorics::__construct()` does only seem to accept `null`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
20	3	}
21
22		/**
23		* @return int
24		*/
25	3	public function count() {
26	3	return $this->fact(count($this->getDataset()))/$this->fact(count($this->getDataset()) - $this->getLength());
27		}
28
29		/**
30		* @return array
31		*/
32	3	public function generator() {
33	3	return $this->permute($this->getDataset(), array());
34		}
35
36		/**
37		* @param $items
38		* @param array $perms
39		*
40		* @return array
41		*/
42	3	protected function permute($items, $perms = array( )) {
43	3	$result = array();
44
45	3	foreach (new Combinations($items, $this->getLength()) as $dataset) {
46	3	if (empty($dataset)) {
47	3	$return = array($perms);
48		} else {
49	3	$return = array();
50	3	$datasetCount = count($dataset) - 1;
51	3	for ($i = $datasetCount; $i >= 0; --$i) {
52	3	$newitems = $dataset;
53	3	$newperms = $perms;
54	3	list($foo) = array_splice($newitems, $i, 1);
55	3	array_unshift($newperms, $foo);
56	3	$return = array_merge($return, $this->permute($newitems, $newperms));
57		}
58		}
59	3	$result = array_merge($result, $return);
60		}
61
62	3	return $result;
63		}
64
65		/**
66		* @return array
67		*/
68	3	public function toArray() {
69	3	$results = array();
70
71	3	foreach($this->generator() as $value) {
		0 ignored issues – show Coding Style introduced 2016-12-19 21:23 UTC by Report Bug Copy Issue Report Expected 1 space after FOREACH keyword; 0 found Loading history...
72	3	$results[] = $value;
73		}
74
75	3	return $results;
76		}
77
78		}
79

drupol / phpermutations

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Permutations::generator() A

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