18、面向对象编程与函数式编程

面向对象编程与函数式编程

在编程领域，面向对象编程（OOP）和函数式编程（FP）是两种重要的编程范式。下面我们将详细探讨它们在实际代码中的应用。

1. 获取特定游戏

我们有一个 getGameByHighestScoreAndPlayedCount 方法，它有两种等效的实现方式，都用于根据最高得分和游玩次数来获取游戏：

public func getGameByHighestScoreAndPlayedCount(highestScore: Int, 
playedCount: Int) -> Game? {
    return getAll().filter({
        (game: Game) -> Bool in
        game.highestScore == highestScore && game.playedCount == 
playedCount
    }).first
}

public func getGameByHighestScoreAndPlayedCount(highestScore: Int, 
playedCount: Int) -> Game? {
    return getAll().filter({ $0.highestScore == highestScore && 
$0.playedCount == playedCount }).first
}

2. 使用 map 转换值