Advent of code 2023/2

Ajax Direct

$games = $input->lines->map(function ($l) {
    $matches = $l->matchAll("/([0-9]+) ([a-z]+)/");
    $game = [];
    foreach ($matches[2] as $i => $color) {
        $game[$color] = max(($game[$color]??0), $matches[1][$i]);
    }
    return $game;
});

// ==================================================
// > PART 1
// ==================================================
$rule = ["red" => 12, "green" => 13, "blue" => 14];

$possible = $games->filter(function ($game) use ($rule) {
    foreach ($rule as $color => $value) {
        if ($game[$color] > $value) return false;
    }
    return true;
});

$solution_1 = $possible->keys()->sum() + $possible->count();

// ==================================================
// > PART 2
// ==================================================
$solution_2 = $games->callEach()->multiply()->sum();