未捕获的TypeError:data.push不是函数 [英] Uncaught TypeError: data.push is not a function

问题描述

我正在尝试

data.push({"country": "IN"});

作为json字符串的新ID和值.但它给出了以下错误

as new id and value to a json string. but it gives the following error

Uncaught TypeError: data.push is not a function

data{"name":"ananta","age":"15"}

高级谢谢您的答复

推荐答案

要使用Array的push函数，您的var必须是一个Array.

To use the push function of an Array your var needs to be an Array.

将data{"name":"ananta","age":"15"}更改为以下内容:

var data = [
    { 
        "name": "ananta",
        "age": "15",
        "country": "Atlanta"
    }
];

data.push({"name": "Tony Montana", "age": "99"});

data.push({"country": "IN"});

..

包含的数组项将是typeof对象，您可以执行以下操作:

The containing Array Items will be typeof Object and you can do following:

var text = "You are " + data[0]->age + " old and come from " + data[0]->country;

注意:请保持一致.在我的示例中，一个数组包含对象属性name和age，而另一个仅包含country.如果我用for或forEach进行迭代，那么我就不能总是检查一个属性，因为我的示例包含了变化的项目.

Notice: Try to be consistent. In my example, one array contained object properties name and age while the other only contains country. If I iterate this with for or forEach then I can't always check for one property, because my example contains Items that changing.

完美将是:data.push({ "name": "Max", "age": "5", "country": "Anywhere" } );

因此，您可以迭代并始终​​获得属性，即使它们为空，null或未定义.

So you can iterate and always can get the properties, even if they are empty, null or undefined.

编辑

要知道的很酷的东西:

var array = new Array();

类似于:

var array = [];

也:

var object = new Object();

类似于:

var object = {};

您也可以将它们组合在一起:

You also can combine them:

var objectArray = [{}, {}, {}];

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