javascript - 我可以为以后可以在 JavaScript 中的 if/else 语句中进行比较的变量定义任意规则(比另一个更大的规则)吗？

Question

我正在用 JavaScript 编写一个类似石头剪刀布的游戏。我让它以某种方式工作，但它更像是写出所有案例而不是让它进行比较。看起来像这样:

var weapons = ["bomb", "knife", "pistol"];


var player = prompt("Choose your weapon: bomb, knife or a pistol?");
console.log("You picked a " + player + ".");

var  = weapons[Math.floor(Math.random() * weapons.length)];
console.log(" picked a " +  + ".");


while (player == ) {
    var player = prompt("You chose " + player + " and he chose " +  + 
    " - the same weapon. Draw is not an option, so " +
    "try again! Pick bomb, knife or pistol.");
    console.log('...');
    var  = weapons[Math.floor(Math.random() * weapons.length)];
    console.log(" picked a " +  + ".")
}

if (player == "bomb" &&  == "knife") 
    console.log( `...`);

else if (player == "bomb" &&  == "pistol")
    console.log(`...`);

else if (player == "knife" &&  == "pistol")
    console.log('...');

else if (player == "knife" &&  == "bomb")
    console.log(`...`);

else if (player == "pistol" &&  == "bomb")
    console.log(`...`);

else if (player == "pistol" &&  == "knife")
    console.log(`...`);

else
    console.log(`...`);

有没有办法将 (bomb > knife && bomb < pistol) 之类的规则存储到某个东西中，然后将其传递给 if/else 进行比较？或者即使可能我也不应该这样做？

Answer 1

您可以将带有决策的对象用作树

decisions = {
    bomb: {
        bomb: function () { },
        knife: function () { },
        pistol: function () { }
    }, knife: {
        bomb: function () { },
        knife: function () { },
        pistol: function () { }
    }, pistol: {
        bomb: function () { },
        knife: function () { },
        pistol: function () { }
    }
};

访问方式

decisions[player][computer]()