Access JSON key value dynamically using jquery

Question

Below is my json which is dynamic. I want to access 'bf' key in the json , 'xxxxxx20160929' and 'yyy813AI20160929' keys are dynamic but json structure will be the same

{
 "resultData": [
 {
 "a": "124",
 "b": "0",
 "c": "0",
 "flc_schedu": {
 "e": "6",
 "f": "en",
 "xxxxxx20160929": [
 {"ID": "yyyyyyyy" },
 {"ID": "fffff"}
 ]
 },
 "fareDetails": {
 "xxxxxx20160929": {
 "yyy813AI20160929": {
 "O": {
 "AD": {
 "bf": "2527"
 }
 }
 }
 }
 }
 }
 ]
}

Below is how I tried

response.resultData[0].fareDetails[Object.keys(response.resultData[0].fareDetails)[0]]

If I try as above I can able to access dynamically up to "xxxxxx20160929" key, but I can't able get how to reach up to "bf" key dynamicaly.

• Patrick: you just need to append .yyy813AI20160929.O.AD.bf
• siva shanker: @Pat : yyy813AI20160929 key is dynamic, its not possible to do like u given
• Samuel: Try this: data.resultData[0].fareDetails.xxxxxx20160929['yyy813AI20160929'].O.AD.bf
• siva shanker: @Samuel : : yyy813AI20160929 key is dynamic, we cannot keep it static as u given
• Patrick: that is simple - you can do this var data = <<< access dynamically up to "xxxxxx20160929" >>> then do this (provided there is only 1 child agreed for xxxxxx20160929) var value; for (var key in data) { value = key; } thenyou have your bf value - data.value.O.AD.bf

Answer 1

You can reference an object using the array syntax.

var one = 'xxxxxx20160929';
var two = 'yyy813AI20160929';
data.resultData[0].fareDetails[one][two].O.AD.bf;

UPDATE:

This code assumes there is only one dynamic object at each layer.

var one = Object.keys(data.resultData[0].fareDetails)[0];
var two = Object.keys(data.resultData[0].fareDetails[one])[0];
var thing = data.resultData[0].fareDetails[one][two].O.AD.bf;

• siva shanker: : xxxxxx20160929, yyy813AI20160929 key are dynamic, we cannot keep it static as u given
• siva shanker: Can you sugget how to access "yyy813AI20160929" dynamically
• Samuel: Do you mean you don't know what the property is named?
• siva shanker: i undestood above way but u kept 'two' variable static and taking 'yyy813AI20160929', i want to know how to take 'yyy813AI20160929' value dynamically from above json
• Samuel: I updated the answer to show how to get the key dynamically for each layer.

Answer 2

function getBFFromFareDetails(details){
 var bfValues = [];
 for(var k in details.fareDetails){
 // loop over the children of fareDetails
 if( details.fareDetails.hasOwnProperty( k ) ) {
 //each entry in ;fareDetails'
 var itemRoot = details.fareDetails[k]
 for(var k1 in itemRoot){
 // loop over the children of the first unknown item
 if( itemRoot.hasOwnProperty( k1 ) ) {
 //return the bf from the first unknown child
 return itemRoot[k1].O.AD.bf;
 }
 }
 } 
 }
}

If you call this with var bf = getBFFromFareDetails(response.resultData[0]) this will return the value for the first bf in the first child of fareDetails and its first child.

You can see a quick example in action here https://jsfiddle.net/tocsoft/5364x2sp/

Answer 3

If you are able to access up to "xxxxxx20160929" level then create a var to store that level, then use that variable to access the next which you will need to store in a variable, then use both variable to access the key needed.

var1 = response.resultData[0].fareDetails)[0];
var2 = response.resultData[0].fareDetails)[0][var1];
response.resultData[0].fareDetails)[0][var1][var2];