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我有一个多维数组，并非所有元素都会被填充。我想将该数组的内容输出到 HTML 表中。我目前有这个：

for (var basketRowJuice = 0; basketRowJuice < 10; basketRowJuice++){
    var outputName = "";
    outputName = (basketArray[0][basketRowJuice]);
    document.getElementById("basketJuiceName" + basketRowJuice).innerHTML = outputName;
}

for (var basketRowQuant = 0; basketRowQuant < 10; basketRowQuant++){
    var outputQuant = 0;
    outputQuant = (basketArray[1][basketRowQuant]);
    document.getElementById("basketJuiceQuant" + basketRowQuant).innerHTML = outputQuant;
}

for (var basketRowPrice = 0; basketRowPrice < 10; basketRowPrice++){
    var outputPrice = 0;
    outputPrice = (basketArray[2][basketRowPrice]);
    document.getElementById("basketJuicePrice" + basketRowPrice).innerHTML = outputPrice;
}

HTML表格：

<table id="basket" cellpadding="0" cellspacing="0" summary="This table lists the items you have in your shopping basket">
                                <caption>Your basket</caption>
                                <tr>
                                    <th scope="col">Juice name</th>
                                    <th scope="col">Number of crates</th>
                                    <th scope="col">Total price</th>
                                </tr>
                                <tr>
                                    <td id="basketJuiceName0"></td>
                                    <td id="basketJuiceQuant0"></td>
                                    <td id="basketJuicePrice0"></td>
                                </tr> 
                                <tr>
                                    <td id="basketJuiceName1"></td>
                                    <td id="basketJuiceQuant1"></td>
                                    <td id="basketJuicePrice1"></td>
                                </tr>   
                                <tr>
                                    <td id="basketJuiceName2"></td>
                                    <td id="basketJuiceQuant2"></td>
                                    <td id="basketJuicePrice2"></td>
                                </tr>
                                <tr>
                                    <td id="basketJuiceName3"></td>
                                    <td id="basketJuiceQuant3"></td>
                                    <td id="basketJuicePrice3"></td>
                                </tr> 
                                <tr>
                                    <td id="basketJuiceName4"></td>
                                    <td id="basketJuiceQuant4"></td>
                                    <td id="basketJuicePrice4"></td>
                                </tr>  
                                <tr>
                                    <td id="basketJuiceName5"></td>
                                    <td id="basketJuiceQuant5"></td>
                                    <td id="basketJuicePrice5"></td>
                                </tr>  
                                <tr>
                                    <td id="basketJuiceName6"></td>
                                    <td id="basketJuiceQuant6"></td>
                                    <td id="basketJuicePrice6"></td>
                                </tr>  
                                <tr>
                                    <td id="basketJuiceName7"></td>
                                    <td id="basketJuiceQuant7"></td>
                                    <td id="basketJuicePrice7"></td>
                                </tr>  
                                <tr>
                                    <td id="basketJuiceName8"></td>
                                    <td id="basketJuiceQuant8"></td>
                                    <td id="basketJuicePrice8"></td>
                                </tr>  
                                <tr>
                                    <td id="basketJuiceName9"></td>
                                    <td id="basketJuiceQuant9"></td>
                                    <td id="basketJuicePrice9"></td>
                                </tr>
                            </table>

但是，如果我的数组仅填充在 [0][9]、[1][9] 和 [2][9] 列中，那么在输出之前，我的 HTML 中会出现巨大的空行间隙。谁能建议一个更好的方法来做到这一点？也许这样我的 javascript 会为每个填充的数组元素插入一个表格行？

我是编程新手，所以请原谅我毫无疑问的冗长和不优雅的代码。

谢谢你，乔恩

4

1 回答 1

1

您可能希望在循环中更像以下内容。

var outputPrice = basketArray[2][basketRowPrice];
if (outputPrice) {
    // do something here.  the if statement will be true for non-null, non-empty, non-zero values of the var outputPrice.
}

我还要注意，您可以将 3 个循环替换为一个，例如：

for (var j = 0; j < 10; j++) {
    for (var i = 0; i < 3; i++) {
        var outputName = basketArray[i][j];
        var outputQuant = basketArray[1][basketRowQuant];
        //.. do the rest of the code
    }
}

最后一步是删除硬编码的HTML并动态生成它，下面是没有检查的，所以它可能有点不对劲，查找DOM方法。

var tbody = document.getElementById('basket').tbodies[0];
for (var j = 0; ...) {
    var tr = document.createElement('tr');
    tbody.appendChild(tr);
    for (var i = 0; ..) {
        var td = document.createElement('td');
        td.innerHTML = ...;
        tr.appendChild(td);
    }
}
于 2012-07-18T14:16:09.023 回答