Remove element from JSON Object

Question

I have a json array which looks something like this:

  {     "id": 1,     "children": [     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     },     {         "id": 2,         "children": {             "id": 3,             "children": {                 "id": 4,                 "children": ""             }         }     }] } 

I would like to have a function which removes the elements which has the "children" empty. How can I do it? I am not asking for the answer, only suggestions

Answer 1

To iterate through the keys of an object, use a for .. in loop:

for (var key in json_obj) {     if (json_obj.hasOwnProperty(key)) {         // do something with `key'     } } 

To test all elements for empty children, you can use a recursive approach: iterate through all elements and recursively test their children too.

Removing a property of an object can be done by using the delete keyword:

var someObj = {     "one": 123,     "two": 345 }; var key = "one"; delete someObj[key]; console.log(someObj); // prints { "two": 345 } 

Documentation:

• https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Working_with_Objects
• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Statements/for...in
• https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/delete