Question

我需要在从对象池中挑选问题后删除或标记属性问题[i] null

var pool = {
        question1: {
            question: "This is question number 1",
            options: ["Option 1", "Option 2", "Option 3", "Option 4"],
            answer: 0,
            used: false /*I add this to mark if this question is used but it doesn't work*/
        },
        question2: {
            question: "This is question number 2",
            options: ["Option 1", "Option 2", "Option 3", "Option 4"],
            answer: 1,
            used: false
        },
        question3: {
            question: "This is question number 3",
            options: ["Option 1", "Option 2", "Option 3", "Option 4"],
            answer: 2,
            used: false
        },
...
};

逻辑：从池中随机挑选一个问题。然后问题被删除或设置为空，因此用户不会再次看到相同的问题（除非重置游戏）。

我已尝试使用delete object.property，但它不起作用：问题仍然存在并生成。另外，我选择了一个属性：used = false（上面）并设置used = true，然后使用if语句对其进行过滤，但它仍然无法正常工作。

function randomQuest(obj) {
        var keys = Object.keys(obj);
        return obj[keys[Math.floor(Math.random() * keys.length)]];
    }

function nextQuest() {
        currentQuest = randomQuest(pool);
        $(".question").html(currentQuest.question);

        for (var i = 0; i < 4; i++) {
            $(".options").append("<div class='option'>" + currentQuest.options[i] + "</div>");
        }

        $(".option").on("click", checkAnswer);

        //TO DO: filter used question
        // I've added the code below here but they don't work
    }

尝试1：delete pool.currentQuest; 尝试2：

if (!currentQuest.used) {
            $(".question").html(currentQuest.question);
        }
        else {
            currentQuest = randomQuest(pool);
        }

Answer 1

由于delete pool.currentQuest没有名为pool的属性，因此currentQuest无效。它具有question1到question3的属性。

您需要跟踪您检索的问题属性，然后将其删除（即delete pool[myVarThatContainsTheQuestPropertyName]）。

就我个人而言，我个人会有一系列问题：

var pool = [{id: 1, question: "", answers: []}, {...}]

然后您可以通过pool = pool.filter(function(q) { return q.id !== currentQuest.id })

之类的内容删除问题

jquery随机选择后删除或设置对象中的null属性

1 个答案: