Accessing nested properties with dynamic property name
You can use Object.keys() to get the array of keys, but instead of for...loop I suggest to iterate over the array of keys with Array.prototype.forEach().
Code:
const obj = {"data": {"Meta Data": {"1. Information": "Monthly Prices (open, high, low, close) and Volumes","2. Symbol": "MSFT","3. Last Refreshed": "2017-08-18","4. Time Zone": "US/Eastern"},"Monthly Time Series": {"2017-08-18": {"1. open": "73.1000","2. high": "74.1000","3. low": "71.2800","4. close": "72.4900","5. volume": "285933387"},"2017-07-31": {"1. open": "69.3300","2. high": "74.4200","3. low": "68.0200","4. close": "72.7000","5. volume": "451248934"}}}};Object .keys(obj.data['Monthly Time Series']) .forEach(function (k) { console.log(obj.data['Monthly Time Series'][k]['1. open']); });
You can access the keys the very same way as you're accessing them now through Object.keys function.
var data = JSON.parse('{"data": {\ "Meta Data": {\ "1. Information": "Monthly Prices (open, high, low, close) and Volumes",\ "2. Symbol": "MSFT",\ "3. Last Refreshed": "2017-08-18",\ "4. Time Zone": "US/Eastern"\ },\ "Monthly Time Series": {\ "2017-08-18": {\ "1. open": "73.1000",\ "2. high": "74.1000",\ "3. low": "71.2800",\ "4. close": "72.4900",\ "5. volume": "285933387"\ },\ "2017-07-31": {\ "1. open": "69.3300",\ "2. high": "74.4200",\ "3. low": "68.0200",\ "4. close": "72.7000",\ "5. volume": "451248934"\ }\}}}');console.log(Object.keys(data['data']["Monthly Time Series"]));Output:
(2) ["2017-08-18", "2017-07-31"]Ah, after your edit, if you want to loop through them, you don't need Object.keys function - you can simply iterate through the object like this:
for (var i in data['data']['Monthly Time Series']) console.log(i, data['data']['Monthly Time Series'][i])i will contain your key
Per comments:
var obj = {"data": { "Meta Data": { "1. Information": "Monthly Prices (open, high, low, close) and Volumes", "2. Symbol": "MSFT", "3. Last Refreshed": "2017-08-18", "4. Time Zone": "US/Eastern" }, "Monthly Time Series": { "2017-08-18": { "1. open": "73.1000", "2. high": "74.1000", "3. low": "71.2800", "4. close": "72.4900", "5. volume": "285933387" }, "2017-07-31": { "1. open": "69.3300", "2. high": "74.4200", "3. low": "68.0200", "4. close": "72.7000", "5. volume": "451248934" }}}}Object.keys(obj.data["Monthly Time Series"]).map(function(key, index){ return obj.data["Monthly Time Series"][key]["1. open"]; });To get one value from the array:
(2) ["73.1000", "69.3300"]or:
Object.keys(obj.data["Monthly Time Series"]).map(function(key, index){ return Object.values(obj.data["Monthly Time Series"][key]); });to get all values (they won't be concated though)