Reading specific JSON data

Question

I'm trying to process some JSON data and read specific parts of it. This is an example of the output I have :

 {
 "operators": {
 "operator1": {
 "top": 20,
 "left": 20,
 "properties": {
 "title": "Input 1",
 "inputs": {},
 "outputs": {
 "output_1": {
 "label": "Output 1"
 }
 }
 }
 },
 "operator2": {
 "top": 80,
 "left": 300,
 "properties": {
 "title": "operator2",
 "inputs": {
 "input_1": {
 "label": "Input 1"
 }
 },
 "outputs": {
 "output_1": {
 "label": "out-1"
 },
 "output_2": {
 "label": "out-2"
 }
 }
 }
 },
 "created_op_0": {
 "top": 60,
 "left": 500,
 "properties": {
 "title": "title",
 "inputs": {
 "input_1": {
 "label": "Input 1"
 }
 },
 "outputs": {}
 }
 }
 },
 "links": {
 "0": {
 "fromOperator": "operator1",
 "fromConnector": "output_1",
 "fromSubConnector": 0,
 "toOperator": "operator2",
 "toConnector": "input_1",
 "toSubConnector": 0
 },
 "1": {
 "fromOperator": "operator2",
 "fromConnector": "output_1",
 "fromSubConnector": 0,
 "toOperator": "created_op_0",
 "toConnector": "input_1",
 "toSubConnector": 0
 }
 },
 "operatorTypes": {}
 }

I want to read the links only.
I've not been able to find any examples on how to do this. Can anyone point me in the right direction.

How do I read and loop through just that using javascript /jquery ?

Thanks

• user5734311: If the above is stored in obj, you can access that part of it using obj.links or obj['links']
• user5734311: Also: developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… and googling "read part of json data" gives loads of relevant results

Answer 1

You can loop over to the keys of links property to get all the objects inside links object:

var data = {
 "operators": {
 "operator1": {
 "top": 20,
 "left": 20,
 "properties": {
 "title": "Input 1",
 "inputs": {},
 "outputs": {
 "output_1": {
 "label": "Output 1"
 }
 }
 }
 },
 "operator2": {
 "top": 80,
 "left": 300,
 "properties": {
 "title": "operator2",
 "inputs": {
 "input_1": {
 "label": "Input 1"
 }
 },
 "outputs": {
 "output_1": {
 "label": "out-1"
 },
 "output_2": {
 "label": "out-2"
 }
 }
 }
 },
 "created_op_0": {
 "top": 60,
 "left": 500,
 "properties": {
 "title": "title",
 "inputs": {
 "input_1": {
 "label": "Input 1"
 }
 },
 "outputs": {}
 }
 }
 },
 "links": {
 "0": {
 "fromOperator": "operator1",
 "fromConnector": "output_1",
 "fromSubConnector": 0,
 "toOperator": "operator2",
 "toConnector": "input_1",
 "toSubConnector": 0
 },
 "1": {
 "fromOperator": "operator2",
 "fromConnector": "output_1",
 "fromSubConnector": 0,
 "toOperator": "created_op_0",
 "toConnector": "input_1",
 "toSubConnector": 0
 }
 },
 "operatorTypes": {}
 };
Object.keys(data.links).forEach(function(key){
 console.log(data.links[key]);
});

• Tom: Sorry for the very late reply to this. Thanks this has helped.