json.stringify return value - json

Question

I'm trying to get datatypes of a JSON.stringify to compare them.
I had used:
var id = d.patogeno;
alert(id);
But it tell the alert that is not defined.
I got this database:
var IDData = JSON.stringify([
["node/9837102", "node/26794", "Customer", "patongenoA", "1412451.0", 3, 520, "1412381"],
["node/9837102", "node/44210", "Customer", "patongenoB", "1436765.0", 2, 384, "1436693"],
]);
and the following function:
function createNodes(startnodes, endnodes, startnodetype, endnodetype, PayTime, TXN_COUNT, Total_Amt, SendTime) {
var node_set = new Set();
var links = [];
var nodetype = d3.set();
startnodes.forEach(function(src, i) {
var tgt = endnodes[i];
node_set.add({
id: src,
type: startnodetype[i]
});
node_set.add({
id: tgt,
type: endnodetype[i]
});
links.push({
source: src,
target: tgt,
paytime: PayTime[i],
patogeno: TXN_COUNT[i], // cambio ---- variable con cual trabajar
total_amt: Total_Amt[i],
SendTime: SendTime[i],
value: 1
});
});
I need to know the value of every patogeno and return it to compare it. Is there a way to do it?, or How to return a specific value, for example: "patogenoB" from IDData?

Answer 1

First, JSON.stringify produces a string.
const obj = {example: 5}
const str = JSON.stringify(obj)
console.log(typeof str) // 'string'
If you want an addressable object, you would do the reverse to a string:
const str = '{"example": 5}'
const obj = JSON.parse(str)
console.log(obj.example) // 5
I do not know how to answer your question with respect to JSON.stringify, nor do I understand why you would be turning an array of arrays into a string instead of converting them into addressable objects, but at the very end of createNodes, you would be able to do this:
links.forEach((d) => console.log(d.patogeno))