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I have been trying to delete a nested object from a JavaScript object, with no success and have not been able to find the correct answer through searching previous posts.

Here is what I have been trying to do. 

<code id='code'></code>

var myobj = {
  "children": [
    {
      "name": "albuterol ",
      "children": [
        {
          "name": "albuterol  - fluticasone ",
          "children": [
            {
              "name": "prednisone ",
              "children": [
                {
                  "name": "dexamethasone ",
                  "children": [],
                  "size": 1,
                  "colname": "CONCEPT_NAME.4"
                }
              ],
              "size": 3,
              "colname": "CONCEPT_NAME.3"
            }
          ],
          "size": 4,
          "colname": "CONCEPT_NAME.2"
        }]}]} 

function deleteObject(myobj) {
    var x = delete myobj.colname
    return (myobj.name, myobj.children)
}

document.getElementById('code').innerText = JSON.stringify(deleteObject(myobj))

I want to delete the object colname. Am I missing something or is the code completely incorrect?

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6
  • myobj does not have a property called colname Commented Jun 27, 2018 at 15:39
  • I am a beginner with JSON. I thought that children, name, size, and colname were objects inside of the JSON. is that incorrect? Commented Jun 27, 2018 at 15:40
  • Do you want to delete every colname? There are many Commented Jun 27, 2018 at 15:42
  • Yes, I would like to delete every colname. Is that impossible? Commented Jun 27, 2018 at 15:43
  • You will need to create a recursive funcion which goes deeper in your array if there is a children prop Commented Jun 27, 2018 at 15:43

2 Answers 2

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4

You need a recursive function to delete the property.

var myobj = {
  "children": [
    {
      "name": "albuterol ",
      "children": [
        {
          "name": "albuterol  - fluticasone ",
          "children": [
            {
              "name": "prednisone ",
              "children": [
                {
                  "name": "dexamethasone ",
                  "children": [],
                  "size": 1,
                  "colname": "CONCEPT_NAME.4"
                }
              ],
              "size": 3,
              "colname": "CONCEPT_NAME.3"
            }
          ],
          "size": 4,
          "colname": "CONCEPT_NAME.2"
        }]}]} 

function deleteColnameRecursive(obj){
  delete obj.colname
  if(obj.children){
     for(var i=0;i<obj.children.length;i++)
         deleteColnameRecursive(obj.children[i]);
  }
}

deleteColnameRecursive(myobj);

console.log(myobj);

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Comments

-3

MyObj does not directly have a property of colname. MyObj has an array named Children.

To delete the proper attribute, select the proper object. For example myObj.children[0].colname

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