从JavaScript对象提取数据 [英] Extract data from JavaScript object

问题描述

如何在下面的对象中将汇率"值"18.52005000"分配给JavaScript变量?

How can I assign the "Exchange Rate" value of "18.52005000" in the object below to a JavaScript variable?

{
    "Realtime Currency Exchange Rate": {
        "1. From_Currency_Code": "USD",
        "2. From_Currency_Name": "United States Dollar",
        "3. To_Currency Code": "MXN",
        "4. To_Currency_Name": "Mexican Peso",
        "5. Exchange Rate": "18.52005000",
        "6. Last Refreshed": "2018-02-17 12:53:11",
        "7. Time Zone": "UTC"
    }
}

我了解一些JavaScript-我使用一个与API进行接口的脚本来转换货币汇率，而我只需要汇率部分即可完成其余的计算.

I know a little bit of JavaScript - a script I made interfaces with an API for currency conversion rates and I simply need the rate portion to do the rest of my calculations.

我正在做类似的事情来创建对象:

I am doing something like this to create the object:

var http_response = httpGet(query_url);
var http_response_json = JSON.parse(http_response);

谢谢！

推荐答案

var exchangeRate =  http_response_json["Realtime Currency Exchange Rate"]["5. Exchange Rate"];

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