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<?php
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/**
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* @author Sergey Glagolev <[email protected]>
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* @link https://github.com/shogodev/argilla/
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* @copyright Copyright © 2003-2013 Shogo
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* @license http://argilla.ru/LICENSE
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* @package frontend.share
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*/
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class Statistics
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{
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protected $lengths = array();
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protected $elements;
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/**
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* @param array $elements
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*/
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public function __construct(array $elements)
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{
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foreach($elements as $element)
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$this->lengths[] = count($element);
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$this->elements = $elements;
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}
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/**
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* Получаем возможные сочетания элементов массива
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*
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* @return array
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*/
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public function getCombinations()
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{
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if( empty($this->elements) )
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return array();
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$combinations = array();
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foreach($this->getCounter() as $i => $combination)
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{
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foreach($combination as $j => $value)
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{
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$combinations[$i][] = $this->getElement($j, $value);
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}
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}
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return $combinations;
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}
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protected function getElement($i, $j)
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{
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return $this->elements[array_keys($this->elements)[$i]][$j];
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}
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/**
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* @return array
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*/
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protected function getCounter()
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{
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$counter = array();
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$element = array_fill(0, count($this->lengths), 0);
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for($i = 0; $i < $this->getCounterLimit(); $i++)
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{
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$combination = $element;
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for($j = count($this->lengths), $number = $i; $j > 0, $number > 0; $j--, $number = $integer)
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list($integer, $combination[$j - 1]) = $this->divQr($number, $this->lengths[$j - 1]);
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$counter[] = $combination;
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}
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return $counter;
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}
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/**
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* @return integer
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*/
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protected function getCounterLimit()
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{
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$limit = 1;
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foreach($this->lengths as $length)
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$limit *= $length;
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return $limit;
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}
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/**
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* Получение частного и остатка от деления
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*
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* @param integer $n
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* @param integer $d
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*
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* @return array
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*/
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protected function divQr($n, $d)
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{
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return array(intval($n / $d), $n % $d);
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}
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} |
shogodev /
argilla
This checks looks for assignemnts to variables using the
list(...)function, where not all assigned variables are subsequently used.Consider the following code example.
Only the variables
$aand$care used. There was no need to assign$b.Instead, the list call could have been.