How to deeply map object keys with JavaScript (lodash)?

Question

https://lodash.com/docs#mapKeys

Is it possible to map an Object\'s keys deeply using Lodash? If not, is there another library providing this functionality (if grouped wi

Answer 1

EDIT: This will map the objects values, not its keys. I misunderstood the question.

---

function deepMap (obj, cb) {
    var out = {};

    Object.keys(obj).forEach(function (k) {
      var val;

      if (obj[k] !== null && typeof obj[k] === 'object') {
        val = deepMap(obj[k], cb);
      } else {
        val = cb(obj[k], k);
      }

      out[k] = val;
    });

  return out;
}

And use it as

var lol = deepMap(test, function (v, k) {
    return v + '_hi';
});

It will recursively iterate over an objects own enumerable properties and call a CB passing it the current value and key. The values returned will replace the existing value for the new object. It doesn't mutate the original object.

See fiddle: https://jsfiddle.net/1veppve1/