Adding string to an array filled with arrays

Question

I have this array object that contains arrays:

var webApps = [
    ['leave empty']
];

I'm ajaxing in some content and the end ajax resulting string will be something like this:

ajaxResult = ',["Alex","Somewhere, NY, 11334"],["Zak","Cherryville, FL, 33921"]';

My question is, how do I take the returned string and add it to the webApps array?

Answer 1

As @Bergi pointed out, it would probably be a good idea to make your ajax call return valid JSON . If thats not something you have control over, then you need to turn it into valid JSON , parse it, and concat to the webApps array:

var webApps = [
    ['leave empty']
];

var ajaxResult = ',["Alex","Somewhere, NY, 11334"],["Zak","Cherryville, FL, 33921"]';

//strip the comma
ajaxResult = ajaxResult.substring(1);

//surround with []
ajaxResult = "[" + ajaxResult + "]";

//parse
ajaxResult = JSON.parse(ajaxResult);

//and concat
webApps = webApps.concat(ajaxResult);

Answer 2

First transform the result into something that is parseable (I hope no other quirks is necessary):

var jsonStr = "["+ajaxResult.slice(1)+"]";
// [["Alex","Somewhere, NY, 11334"],["Zak","Cherryville, FL, 33921"]]
// would be better if it looked like that in the first place

Now we can parse it, and push the single items on your array:

var arr = JSON.parse(jsonStr);
webApps.push.apply(webApps, arr);

We could've used a loop as well, but push can take multiple arguments so it's easier to apply it.

Answer 3

The following works if the browser supports JSON.

var webApps = [
    ['leave empty'],['one']
];
var str = JSON.stringify(webApps);
// "[["leave empty"],["one"]]"

str = str.substr(0, str.length-1);
//"[["leave empty"],["one"]"

//var arr = eval(str + ajaxResult + "]");
// more secure way
var arr = JSON.parse(str + ajaxResult + "]");

Answer 4

webApps = eval("[['"+(webApps[0]).toString()+"']"+ajaxResult+"]");

这很奇怪，但解决你的问题。

Answer 5

如果 ajax 结果是字符串，您可以将其转换为对象并将每个属性添加到 webapps var。

var data = eval('(' + ajaxResult + ')'); // data is a javascript array now, do anything you want