/**
* Calculate all possible plant yields for current
* un-bred candy cane plants
*
* @return $this
*/
private function calculateBreedYields()
{
$this->yields = [];
$this->each(function (CandyCanePlant $plantA) {
if ($plantA->hasBred()) {
return;
}
$this->each(function (CandyCanePlant $plantB) use($plantA) {
if ($plantA === $plantB || $plantB->hasBred()) {
return;
}
$yieldA = $this->breederService->calculateYield($plantA, $plantB);
$yieldB = $this->breederService->calculateYield($plantB, $plantA);
$this->yields[$yieldA] = new PlantCouple($plantA, $plantB);
$this->yields[$yieldB] = new PlantCouple($plantB, $plantA);
});
});
krsort($this->yields);
return $this;
}
<?php
/**
* File index.php
*
* @author Edward Pfremmer <*****@*****.**>
*/
require_once 'vendor/autoload.php';
use PHPWeekly\Collection\CandyCanePlantCollection;
use PHPWeekly\Service\CandyCanePlantBreederService;
use PHPWeekly\Plant\CandyCanePlant;
$breederService = new CandyCanePlantBreederService();
$plantCollection = new CandyCanePlantCollection([new CandyCanePlant(5), new CandyCanePlant(3), new CandyCanePlant(2)]);
/*
* To convert this to be able to calculate yield loss due to time this would
* need to be called recursively. Each iteration representing 1 weeks time.
*
* Plant offspring would be pushed to a separate collection, each previous generation
* plant's yield would be decremented by one with each iteration before mergine the
* two collections back together for the next iteration.
*/
while ($couple = $plantCollection->getTopCouple()) {
$offspring = $breederService->breed($couple->getFather(), $couple->getMother());
$plantCollection->push($offspring);
}
// calculate total yield
$yield = $plantCollection->reduce(function ($result, CandyCanePlant $plant) {
return $result + $plant->getYield();
});
// print results
$plantCollection->each(function (CandyCanePlant $plant) {
public function testCalculateYield()
{
$father = new CandyCanePlant(5);
$mother = new CandyCanePlant(3);
$this->assertEquals(5 ** 3 % (5 + 3), $this->breederService->calculateYield($father, $mother));
}
