如何调用从Yahoo Finance API收到的JSON数据？

Question

When I use the Yahoo Finance API to retrieve stock quotes from a certain company.

Using the following Javascript code, I was able to retrieve stock data:

console.log(JSON.stringify(quotes[i], null, 2));

I get the following output in my console:

{
  "date": "2017-06-06T04:00:00.000Z",
  "open": 153.899994,
  "high": 155.809998,
  "low": 153.779999,
  "close": 154.449997,
  "adjClose": 154.449997,
  "volume": 26624900,
  "symbol": "AAPL"
}

So from here, I want to call on only the "close" index from that JSON object. To do this, I tried adding the following in my javascript:

  var stockClose = JSON.parse(quotes[i]);
  console.log(stockClose.close); 

This however does not console log the "close" index of the JSON object. I know this is probably a really dumb mistake I am making and would be grateful if someone could help me debug this. How do I retrieve the "close" index from the quotes object ?

Answer 1

JSON.stringify() converts a JavaScript value to a JSON string.

JSON.parse() parses a JSON string, constructing the JavaScript value or object described by the string.

Based on your console log information, we can see it is already a JSON object . So we do not JSON.parse() to parse your quotes[i].

You can either use quotes[i].close or quotes[i]["close"] to access it.