Question

我正在使用node.js yahoo-finance模块来检索Apple和Google股票价格。这有效，代码如下所示。

var util = require('util');

require('colors');

var _ = require('lodash');
var yahooFinance = require('yahoo-finance');

var FIELDS = _.flatten([
    //symbol,name, lastTradeDate, lastTradePriceOnly,
    ['s', 'n', 'd1', 'l1']
]);

var SYMBOLS = [
    'AAPL',
    'GOOG',
];

yahooFinance.snapshot({
    fields: FIELDS,
    symbols: SYMBOLS
}).then(function (result) {
    _.each(result, function (snapshot, symbol) {            
        console.log(JSON.stringify(snapshot, null, 2));
    });
});

最后console.log(JSON.stringify(snapshot, null, 2));的输出如下所示;

{
  "symbol": "AAPL",
  "name": "Apple Inc.",
  "lastTradeDate": "2015-11-03T16:00:00.000Z",
  "lastTradePriceOnly": 122
}
{
  "symbol": "GOOG",
  "name": "Alphabet Inc.",
  "lastTradeDate": "2015-11-03T16:00:00.000Z",
  "lastTradePriceOnly": 728.11
}

问题是它看起来像json但它仍然不是格式正确的json。

所需的json看起来像这样;

[{
    "symbol": "AAPL",
    "name": "Apple Inc.",
    "lastTradeDate": "2015-11-03T16:00:00.000Z",
    "lastTradePriceOnly": 122
},
{
    "symbol": "GOOG",
    "name": "Alphabet Inc.",
    "lastTradeDate": "2015-11-03T16:00:00.000Z",
    "lastTradePriceOnly": 728.11
}]

如何更改代码以获得所需的json输出？这很棘手，因为每个json对象都是按任务而不是一次性异步释放的。

Answer 1

感谢ojovirtua的评论，我找到了答案。

yahooFinance.snapshot({
    fields: FIELDS,
    symbols: SYMBOLS
}).then(function (result) {
    console.log(JSON.stringify(result));
});

将这两个异步释放的json对象组合成单个json字符串

1 个答案: