I am banging my head trying to figure this out. And it should not be this hard. I am obviously missing a step.
I am pulling data from: openaq.org
The object I get back is based on a JSON object.
For now, I am using jQuery to parse the object and I am getting to the sub portion of the object that hold the specific parameter I want but I can't get to the specific key,value pair.
The object does not come back in the same order all the time. So when I tried to originally set up my call I did something like
obj.results.measurements[0].
Well since the obj can come back in an random order, I went back to find the key,value pair again and it was the wrong value, throwing my visual off.
That said, I have looked at use jQuery's find() on JSON object and for some reason can not get what I need from the object I am given by openaq.org.
One version of the object looks like this:
{"meta":{"name":"openaq-api","license":"CC BY 4.0d","website":"https://u50g7n0cbj.execute-api.us-east-1.amazonaws.com/","page":1,"limit":100,"found":1},"results":[{"location":"Metro Lofts","city":null,"country":"US","coordinates":{"latitude":39.731,"longitude":-104.9888},"measurements":[{"parameter":"pm10","value":49.9,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"µg/m³"},{"parameter":"pm1","value":24,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"µg/m³"},{"parameter":"um100","value":0,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"particles/cm³"},{"parameter":"um025","value":0.28,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"particles/cm³"},{"parameter":"um010","value":4.1,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"particles/cm³"},{"parameter":"pm25","value":41.1,"lastUpdated":"2021-08-09T20:49:38+00:00","unit":"µg/m³"}]}]}
I am trying to get the "pm25" value.
The code I have tried is this:
function getAirQualityJson(){
$.ajax({
url: 'https://api.openaq.org/v2/latest?coordinates=39.73915,-104.9847',
type: 'GET',
dataType: "json"
// data: data ,
}).done(function(json){
console.log("the json is" + JSON.stringify(json));
console.log("the json internal is" + JSON.stringify(json.results));
var obj = json.results;
var pm25 = "";
//console.log(JSON.stringify(json.results.measurements[0]["parameter"]));
$.each(json.results[0], function(i,items){
//console.log("obj item:" + JSON.stringify(obj[0].measurements));
$.each(obj[0].measurements, function(y,things){
//console.log("each measurement:" + JSON.stringify(obj[0].measurements[0].value));//get each measurement
//pm 2.5
//Can come back in random order, get value from the key "pm25"
// pm25 = JSON.stringify(obj[0].measurements[2].value);
pm25 = JSON.stringify(obj[0].measurements[0].value);
console.log("pm25 is: " + pm25); // not right
});
});
//Trying Grep and map below too. Not working
jQuery.map(obj, function(objThing)
{ console.log("map it 1:" + JSON.stringify(objThing.measurements.parameter));
if(objThing.measurements.parameter === "pm25"){
// return objThing; // or return obj.name, whatever.
console.log("map it:" + objThing);
}else{
console.log("in else for pm25 map");
}
});
jQuery.grep(obj, function(otherObj) {
//return otherObj.parameter === "pm25";
console.log("Grep it" + otherObj.measurements.parameter === "pm25");
});
});
}
getAirQualityJson();
https://jsfiddle.net/7quL0asz/
The loop is running through I as you can see I tried [2] which was the original placement of the 'pm25' value but then it switched up it's spot to the 3rd or 4th spot, so it is unpredictable.
I tried jQuery Grep and Map but it came back undefined or false.
So my question is, how would I parse this to get the 'pm25' key,value. After that, I can get the rest if I need them.
Thank you in advance for all the help.
