JavaScript 中的变量赋值 [英] Variable assignment in JavaScript

问题描述

我有一个js函数

我想给一个变量赋值

我的变量在 forloop 中

my variable is in a forloop

我有两个变量

即;

var spcd_1= "http://www.colbridge.com";
var spcd_2 = "http://www.google.com";

下面是我的js函数

function openNewWindow(spcd) {
//alert("hello");
var tt = spcd;
alert(tt);
var i=0;
var spcd_1= "http://www.colbridge.com";
var spcd_2 = "http://www.google.com";
for(i=1;i<3;i++)
{
var theurl="'spcd_'+i";
 popupWin = window.open(theurl,
 '_blank',
 'menubar, toolbar, location, directories, status, scrollbars, resizable, dependent, width=640, height=480, left=0, top=0')

}
}

我的问题在这里

var theurl=spcd_+i;

我想将 theurl 值更改为 spcd_1 和 spcd_2

I want to change theurl value to spcd_1 and spcd_2

如何在 for 循环中正确分配

how to assign this correctly in the for loop

var theurl=spcd_+i;

谁能告诉我正确的方法.

can any one show me the correct method.

谢谢

推荐答案

听起来您想要索引一个数组，而不是试图将自己连接到一个变量名.这是您修改的代码

Sounds like you want to index an array, rather than trying to concatenate yourself up a variable name. Here's your code modified

function openNewWindow(spcd) {
    //alert("hello");
    var tt = spcd;
    alert(tt);
    var i=0;
    var spcds = [];
    spcds.push("http://www.colbridge.com");
    spcds.push("http://www.google.com");
    for(i=0;i<spcds.length;i++)
    {
        var theurl=spcds[i];
        popupWin = window.open(theurl,
        '_blank',
        'menubar, toolbar, location, directories, status, scrollbars, resizable, dependent, width=640, height=480, left=0, top=0')

    }
}

只是为了傻笑，这里是您如何继续使用连接来获取变量名称的方法.javascript 中的对象也可以是关联数组，这意味着您可以使用数组语法来创建并检索任意属性

Just for giggles, here's how you could keep using concatenation to get to your variable name. Objects in javascript can also be associative arrays, meaning you can use the array syntax to create and retrieve arbitrary properties

    var spcds = {};
    spcds['spcd_1'] = "http://www.colbridge.com";
    spcds['spcd_2'] = "http://www.google.com";
    //...
    var theurl = spcds['spcd_' + i];

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