<?php
/**
* A code sample which converts odd integers to word strings and returns the sum of the common factors of even numbers.
*
* The input is assumed to be a random list of integers. For the sum of the common factors of even numbers
* only positive values are taken into consideration
*/
error_reporting(E_ALL);
function exception_handler($exception) {
echo get_class($exception). ' : ' . $exception->getMessage(), "\n";
}
set_exception_handler('exception_handler');
//start
$iB = new IntelligentBee(array(6,12,48, 7, 101, 67));
//$iB->processOddNumbers();
$sum = $iB->processEvenNumbers();
echo PHP_EOL.'Sum of common factors: ' . $sum . PHP_EOL;
//end
class IntelligentBee{
const OneHundred = 100;
const OneThousand = 1000;
const OneMillion = 1000000;
const OneBillion = 1000000000;
protected $minCommonFactors = [];
protected $oddNumbers = [];
protected $evenNumbers = [];
protected $startInt;
protected $endInt;
public function __construct(array $arrayOfIntegers){
$this->evenNumbers = range(2, self::OneThousand, 2);
}
public function processEvenNumbers()
{
$commonFactors = $this->calcFactors($this->getClosestEvenToZero($this->startInt, $this->endInt, $this->evenNumbers));
foreach($this->evenNumbers as $evenNumber){
$commonFactors = $this->checkIfHasCommonFactors($evenNumber, $commonFactors);
}
return array_sum($commonFactors);
}
protected function getClosestEvenToZero($startInt, $endInt, $evenNumbers){
$dist = abs($evenNumbers[0]);
$idx = 0;
$totalNo = count($evenNumbers);
for($i=0;$i<$totalNo;$i++){
$newDist = abs($evenNumbers[$i]);
if($newDist < $dist){
$idx = $i;
$dist = $newDist;
}
if($dist == 0){//only if evenNumbers is sorted
return $evenNumbers[$idx];
}
}
return $evenNumbers[$idx];
}
protected function checkIfHasCommonFactors($int, array $minCommonFactors){
$int = abs($int);
$cF = $this->calcFactors($int);
return array_intersect($cF, $minCommonFactors);
}
private function calcFactors($int)
{
$int = abs($int);
$cF = [];
$max = $int/2;
for($i=1;$i<=$max;$i++){
if(0 === $int%$i){
$cF[] = $i;
}
}
$cF[] = $int;
return $cF;
}
}
- Output for git.master, git.master_jit, rfc.property-hooks
- Sum of common factors: 3
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