Question

I’m currently looping through an array of waypoints that are returned from the Google Maps API, in the following array I wish to access the values that are labelled Xa and Ya and at the moment I am doing it in this way – [i]["location"]["Xa"], however Xa and Ya are not always the same, sometimes it could be aB and aC or Ya and Za etc. Is there a generic way to access these values?

[
   {
      "location":{
         "Xa":xx.xxxxxxxxxxxxx,
         "Ya":xx.xxxxxxxxxxxxx
      },
      "stopover":true
   },
   {
      "location":{
         "Xa":xx.xxxxxxxxxxxxx,
         "Ya":xx.xxxxxxxxxxxxx
      },
      "stopover":true
   },
   {
      "location":{
         "Xa":xx.xxxxxxxxxxxxx,
         "Ya":xx.xxxxxxxxxxxxx
      },
      "stopover":true
   },
   {
      "location":{
         "Xa":xx.xxxxxxxxxxxxx,
         "Ya":xx.xxxxxxxxxxxxx
      },
      "stopover":true
   }
]

Answer 1

First of all, this is a javascript object (All associative arrays are actually objects in JavaScript).

If you are sure that the location object will contain only 2 properties, you can use the for ... in statement and be sure that the first element you access is the X Coordinate and the 2nd is the Y Coordinate.

Refer: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for…in