javascript find by value deep in a nested object/array

Question

hello , I have a problem returning an object in my function, Let\'s say I have an object:

var elements = [{
    \"fields\": null,
    \"id_b         


        

Answer 1

You're missing a return after making the recursive call. If the object is found after recursing, you need to continue to bubble that result up (by returning it). You should also be using i < len (not i <= len) as pointed out by @scott-marcus.

var elements = [{
    "fields": null,
    "id_base": "nv_container",
    "icon": "layout",
    "name": "container",
    "is_container": true,
    "elements": [
      //another elements set here
    ]
  },
  {
    "id_base": "novo_example_elementsec",
    "name": "hello",
    "icon": "edit",
    "view": {}
  }
];

function findNested(obj, key, value) {
  // Base case
  if (obj[key] === value) {
    return obj;
  } else {
    for (var i = 0, len = Object.keys(obj).length; i < len; i++) {
      if (typeof obj[i] == 'object') {
        var found = this.findNested(obj[i], key, value);
        if (found) {
          // If the object was found in the recursive call, bubble it up.
          return found;
        }
      }
    }
  }
}

console.log(findNested(elements, "icon", "layout")); // returns object
console.log(findNested(elements, "icon", "edit")); // returns object
console.log(findNested(elements, "foo", "bar")); // returns undefined