Question

我有以下代码 -

    <script type="text/javascript">
function test() {
    var results = "";
    var myArray    = new Array();
    myArray[0] = "Customizable";
    myArray[1] = "Marketing Collateral";
    myArray[2] = "Online Marketing";
    myArray[3] = "Training";
    myArray[4] = "Event Resources";
    myArray[5] = "Marketing Logos";
    myArray[6] = "Competitive Solution Comparison";
    myArray[7] = "Sales Tools";
    myArray[8] = "Retail Marketing"
    myArray[9] = "Internal";        

    results = "<table>";
for (var i=0; i<myArray.length; i++) {
    results += "<tr><td>" + myArray[i] + "</td>";  
    results += "<td>" + myArray[i+1] + "</td></tr>";  
}

results += "<tr><td colspan=2><a href='#' onclick='javascript:RedirectParentToDownload();'>View all content ></a></td></tr>";
results += "<table><br /> <br />";

 var div = document.getElementById("associatedAssets");
    div.innerHTML = results;    
}
</script>
<body onload="javascript:test();">
<div id="associatedAssets"></div>


 </body>

如何将输出呈现为2列和n行？我希望输出看起来像这样 -

    Customizable      Marketing Collateral
    Online Marketing  Training
    Event Resources   Marketing Logos
    etc

Answer 1

如果您将循环更改为：

for (var i=0; i<myArray.length; i=i+2) {

然后你的代码基本上有效。但是，您需要检查myArray[i+1]是否存在，以便它也适用于奇数个元素。

Answer 2

Here它正在工作和修复。

在这里你必须跳过第二个数字，因为有2列

for (var i = 0; i < myArray.length; i+=2 )

您还必须检查第二个元素。如果数组中的元素甚至没有问题，它们可以除以2.如果它是奇数，则调用不存在的元素。使用ternary operator

检查是否未定义

( myArray[i+1]===undefined ? '' : myArray[i+1] )

或更简单

( myArray[i+1] || '' )

Answer 3

你需要在你的for循环中使用i的增量为2 在将数组内容连接到HTML字符串时，还要在使用它之前添加一个检查以查看第i + 1个元素是否存在。

试试这个：

    function test() {
        var results = "";
        var myArray    = new Array();
        myArray[0] = "Customizable";
        myArray[1] = "Marketing Collateral";
        myArray[2] = "Online Marketing";
        myArray[3] = "Training";
        myArray[4] = "Event Resources";
        myArray[5] = "Marketing Logos";
        myArray[6] = "Competitive Solution Comparison";
        myArray[7] = "Sales Tools";
        myArray[8] = "Retail Marketing"
        myArray[9] = "Internal";        

        results = "<table>";
            for (var i=0; i<myArray.length; i=i+2) { //###NOTICE THE CHANGE FROM i++ TO     i=i+2               
                results += "<tr><td>" + myArray[i] + "</td>";  
                if(i+1 < myArray.length){
                                results += "<td>" + myArray[i+1] + "</td></tr>";  
                } else{
                             results += "<td></td></tr>";   
                }
            }

        results += "<tr><td colspan=2><a href='#' onclick='javascript:RedirectParentToDownload();'>View all content ></a></td></tr>";
        results += "<table><br /> <br />";

         var div = document.getElementById("associatedAssets");
        div.innerHTML = results;    
    }

使用Javascript在包含2列的表中显示数组数据

3 个答案: