JavaScript nested JSON of same name

Question

{"func" : "sprint", "nest" : {"func" : "walk", "nest": {"func" : "run"}}}

Above is an example of a nested Json object.

These can range from a single object to many nested objects. I want to call method based on the most nested object to the least nested.

In the example there is 2 nest values. How can I call the last one to the first in this order

func : run

than

func : walk

than

func : sprint

Answer 1

You could take a recursive depth-first search for the nested object.

function depthFirst(object) {
 return [...(object.nest ? depthFirst(object.nest) :[]), object.func];
}
var data = { func: "sprint", nest: { func: "walk", nest: { func: "run" } } };
console.log(depthFirst(data));

• user3277468: I haven't seen something like this before, Do you have a good link so I can read up depthFirst, Also in the return statement what is the 3 periods for?
• Nina Scholz: spread syntax ... returns the items of iterables as parameters.