Question

为学校和阵列工作项目正在给我带来严重的问题。他们正在返回错误：

Uncaught ReferenceError: oddNumbers is not defined.

我完全按照本网站上的其他问题提出要求，但无济于事。你可以在ScriptManager中看到“类”（因为我习惯于Java和C＃），oddNumbers和evenNumbers不能被推入。请告诉我什么是错的。

var manager = new ScriptManager();

function enterNumber() {
    var number = prompt("Enter a number");
    if (manager.addNumber(number)) {
        document.getElementById("even").innerHTML = manager.getEvenNumbers();
        document.getElementById("odd").innerHTML = manager.getOddNumbers();
        document.getElementById("sum").innerHTML = manager.sum;
        document.getElementById("average").innerHTML = manager.average;
    }
}

function ScriptManager() {
    this.count = 0;
    this.oddCount = 0;
    this.evenCount = 0;
    this.sum = 0;
    this.average = 0;
    this.oddNumbers = [];
    this.evenNumbers = [];
    this.addNumber = function(number) {
        if (!isNaN(parseInt(number))) {
            number = parseInt(number);
            if (number % 2 == 0) {
                evenNumbers.push(number);
                evenCount++;
                count++;
            } else {
                oddNumbers.push(number);
                oddCount++;
                count++;
            }
        } else {
            alert(number + " is not a valid number.");
            return false;
        }
        for (var x = 0; x < oddCount; x++) {
            sum += oddNumbers[x];
        }
        for (var x = 0; x < evenCount; x++) {
            sum += evenNumbers[x];
        }
        average = sum / count;
        return true;
    };
    this.getEvenNumbers = function() {
        var stream = "";
        var first = true;
        for (var x = 0; x < evenCount; x++) {
            if (!first) {
                stream + ", ";
            }
            stream += String.valueOf(evenNumbers[x]);
            if (first) {
                first = false;
            }
        }
        return stream;
    }
    this.getOddNumbers = function() {
        return "bleh";
    }
}

Answer 1

您需要在所有对象属性之前使用this.前缀。

this.addNumber = function(number) {
    if (!isNaN(parseInt(number))) {
        number = parseInt(number);
        if (number % 2 == 0) {
            this.evenNumbers.push(number);
            this.evenCount++;
            this.count++;
        } else {
            this.oddNumbers.push(number);
            this.oddCount++;
            this.count++;
        }
    } else {
        alert(number + " is not a valid number.");
        return false;
    }
    for (var x = 0; x < oddCount; x++) {
        this.sum += this.oddNumbers[x];
    }
    for (var x = 0; x < evenCount; x++) {
        this.sum += this.evenNumbers[x];
    }
    this.average = this.sum / this.count;
    return true;
};

Answer 2

在javascript中，您必须在成员变量前使用this来访问它们。所以：

oddNumbers.push(number);

需要：

this.oddNumbers.push(number);

并且，类似于所有其他成员变量。

javascript数组未定义

2 个答案: