Online PHP editor | output for JIBoI

<?php class Person { public readonly string $lastName; public readonly string $firstName; private readonly int $strength; private readonly int $agility; private readonly int $intelligence; private readonly int $charisma; private readonly int $luck; /** * @param non-empty-string|null $lastName */ public function __construct(?string $lastName = null) { $this->lastName = $lastName ?? $this->randomName(); $this->firstName = $firstName ?? $this->randomName($this->lastName[0]); $this->strength = $this->randomFeatureValue(); $this->agility = $this->randomFeatureValue(); $this->intelligence = $this->randomFeatureValue(); $this->charisma = $this->randomFeatureValue(); $this->luck = $this->randomFeatureValue(); } public function __clone(): void { $this->firstName = $this->randomName($this->lastName[0]); $this->strength = $this->evolveFeatureValue($this->strength); $this->agility = $this->evolveFeatureValue($this->agility); $this->intelligence = $this->evolveFeatureValue($this->intelligence); $this->charisma = $this->evolveFeatureValue($this->charisma); $this->luck = $this->evolveFeatureValue($this->luck); } public function getName(): string { return $this->lastName . ' ' . $this->firstName; } public function getValue(): int { return $this->strength + $this->agility + $this->intelligence + $this->charisma + $this->luck; } public function getDetails(): string { return $this->getName() . ' ' . $this->getValue() . '(' . $this->strength . '+' . $this->agility . '+' . $this->intelligence . '+' . $this->charisma . '+' . $this->luck . ')'; } /** * @return int * @throws Exception */ private function randomFeatureValue(): int { return random_int(0, 9); } private function evolveFeatureValue(int $value): int { return min(max($value + random_int(-1, 1), 0), 9); } public function randomName(?string $notStartingWith = null): string { $possibleNames = ['Alice', 'Bob', 'Charlie', 'Dave', 'Eve', 'Frank', 'Grace', 'Heidi', 'Ivan', 'Judy', 'Kevin', 'Linda', 'Mallory', 'Niaj', 'Olivia', 'Peggy', 'Quentin', 'Rupert', 'Sybil', 'Trent', 'Ursula', 'Victor', 'Walter', 'Xavier', 'Yvonne', 'Zoe']; do { $randomName = $possibleNames[array_rand($possibleNames)]; } while ($notStartingWith !== null && $randomName[0] === $notStartingWith); return $randomName; } } class Life { /** @var Person[] */ private array $population = []; public function run(int $iterations) { while ($iterations-- > 0) { $this->runIteration(); } } public function runIteration() { $this->new(); $this->reproduce(); } public function geStatisticsOnMostValuable() { $topMostValuablePersons = $this->getTopMostValuablePersons(10); $statistics = array_map( fn(Person $person) => $person->getDetails(), $topMostValuablePersons, ); return implode("\n", $statistics); } private function new(): void { foreach (range(1, 3) as $_) { $this->addPerson(new Person()); } } private function reproduce(): void { $topMostValuablePerson = $this->getTopMostValuablePersons(5); // usual evolution foreach (range(1, 3) as $_) { $randomValuablePerson = $topMostValuablePerson[array_rand($topMostValuablePerson)]; $this->addPerson(clone $randomValuablePerson); } // tracked evolution $randomValuablePerson = $topMostValuablePerson[array_rand($topMostValuablePerson)]; $this->addPerson(clone $randomValuablePerson with (lastName: '0000')); } private function addPerson(Person $person) { /** add a person, eventually killing one that already has the same name */ $this->population[$person->getName()] = $person; } /** * @param int $int * @return Person[] */ private function getTopMostValuablePersons(int $int): array { $population = $this->population; uasort($population, function (Person $person1, Person $person2) { return $person2->getValue() <=> $person1->getValue(); }); return array_slice($population, 0, $int); } } $life = new Life(); $life->run(100); echo $life->geStatisticsOnMostValuable();