drupol\phpermutations\Combinatorics

Complexity

Total Complexity

9

Size/Duplication

Total Lines	107
Duplicated Lines	0 %

Coupling/Cohesion

Dependencies

0

Test Coverage

Coverage

0%

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
A	setLength()	0	7	3
A	getLength()	0	4	1
A	setDataset()	0	6	1
A	getDataset()	0	4	1
A	fact()	0	4	2

<?php

namespace drupol\phpermutations;

/**
 * Class Combinatorics.
 *
 * @package drupol\phpermutations
 */
abstract class Combinatorics implements \Countable
{
    /**
     * The dataset.
     *
     * @var array
     */
    protected $dataset;

    /**
     * The number of values in the dataset.
     *
     * @var int
     */
    protected $datasetCount;

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

    /**
     * Combinatorics constructor.
     *
     * @param array $dataset
     *   The dataset.
     * @param int|null $length
     *   The length.
     */
    public function __construct(array $dataset = [], $length = null)
    {
        $this->setDataset($dataset);
        $this->datasetCount = count($this->dataset);
        $this->setLength($length);
    }

    /**
     * Set the length.
     *
     * @param int $length
     *   The length.
     *
     * @return $this
     */
    public function setLength($length = null)
    {
        $length = is_null($length) ? $this->datasetCount : $length;
        $this->length = ($length > $this->datasetCount) ? $this->datasetCount : $length;

        return $this;
    }

    /**
     * Get the length.
     *
     * @return int
     *   The length.
     */
    public function getLength()
    {
        return (int) $this->length;
    }

    /**
     * Set the dataset.
     *
     * @param array $dataset
     *   The dataset.
     *
     * @return $this
     */
    public function setDataset(array $dataset = [])
    {
        $this->dataset = $dataset;

        return $this;
    }

    /**
     * Get the dataset.
     *
     * @return mixed[]
     *   The dataset.
     */
    public function getDataset()
    {
        return $this->dataset;
    }

    /**
     * Compute the factorial of an integer.
     *
     * @param int $n
     *   The number to get its factorial.
     * @param int $total
     *   The total.
     *
     * @return int
     *   The factorial of $n.
     */
    protected function fact($n, $total = 1)

Avoid variables with short names like $n. Configured minimum length is 3.

    {
        return ($n < 2) ? $total : $this->fact($n - 1, $total * $n);
    }
}