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

Nina Scholz · Accepted Answer · 2019-09-09 15:24:33Z

6

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));

edited Sep 9, 2019 at 15:24

answered Sep 9, 2019 at 15:06

Nina Scholz

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2 Comments

user3277468 Over a year ago

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 Over a year ago

spread syntax ... returns the items of iterables as parameters.

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