extract data from a JSON object

I am in possession of the JSON data shown below:

[

{
    "AVG_VALUE" : "2540", 
    "MAX_VALUE" : "2540",
    "SUM_VALUE" : "2540",
    "MIN_VALUE" : "2540",
    "METRICID" : "100248060212",
    "START" : "1449216120000",
    "STARTTIME" : "09:02"
}
,
{
    "AVG_VALUE" : "2624", 
    "MAX_VALUE" : "2708",
    "SUM_VALUE" : "5248",
    "MIN_VALUE" : "2540",
    "METRICID" : "100248060219",
    "START" : "1449216120000",
    "STARTTIME" : "09:02"
}
]

However, I am uncertain on how to extract the values from it. Currently, I am utilizing the dojo toolkit and have generated my file using the following code snippet:

var stream = dojo.xhrGet({
            url : self.jsonFile,
            content : {
                startTime : 1449136661084,
                endTime :   1449482261084,
                interValMillis : (interval * 1000),
                metricid : 100248060219
            },
            handleAs : "json",
            sync : true,
            load : function(response, ioArgs) {
                self.data = response;
                self._metricIds = _metricIds;
                self._params = _params;
                self.convertData(self);
                console.log("ok:"+response);
                data = response;
            }
        });

After executing the above code, all the values now reside in my 'response' variable. However, I am unsure how to access it to retrieve, for example, the value of the first AVG_VALUE field.

javascriptjsondojo

Answer №1

When working with JSON data, it is stored in object arrays. Therefore, you will need to iterate through them in order to access the values contained inside.

for (var i = 0; i < response.length; i++) {
var jsonData = response[i];
jsonData['AVG_VALUE'] 
}

The code above retrieves all values corresponding to the variable AVG_VALUE. If you only require the first value, then you can use:

 var jsonData = response;
jsonData[0]['AVG_VALUE']

Answer №2

Feedback is represented as an object array. You have the option to access it using response[0]['AVG_VALUE'] or response[0].AVG_VALUE.

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