SLM SLM - 2 months ago 15
Javascript Question

Key value pairs using JSON

Is there a way to handle data structures using JSON object in a way of Key/ Value pairs?

If so can some one elaborate how to access associated value object from the key

Assume that I have something like this

KEY1 | VALUE OBJECT1 - (NAME: "XXXXXX", VALUE:100.0)
KEY2 | VALUE OBJECT2 - (NAME: "YYYYYYY", VALUE:200.0)
KEY3 | VALUE OBJECT3 - (NAME: "ZZZZZZZ", VALUE:500.0)

Answer

A "JSON object" is actually an oxymoron. JSON is a text format describing an object, not an actual object, so data can either be in the form of JSON, or deserialised into an object.

The JSON for that would look like this:

{"KEY1":{"NAME":"XXXXXX","VALUE":100},"KEY2":{"NAME":"YYYYYYY","VALUE":200},"KEY3":{{"NAME":"ZZZZZZZ","VALUE":500}}

Once you have parsed the JSON into a Javascript object (called data in the code below), you can for example access the object for KEY2 and it's properties like this:

var obj = data.KEY2;
alert(obj.NAME);
alert(obj.VALUE);

If you have the key as a string, you can use index notation:

var key = 'KEY3';
var obj = data[key];