Uncover and control nested objects in JSON data

Question

Uncover and control nested objects in JSON data

Having a dynamic foo object with the possibility of nested parent objects raises the question of how to effectively:

1) Determine the last object that has a parent?

2) Create an array containing all nested parent objects along with the initial obj (foo.obj)?

 foo: {
    caption: "Italian",
    code: "",
    id: 17,
    parent: {
       caption: "Restaurants",
       code: "",
       id: 9,
       parent: {
          caption: "Food and Drink",
          code: "food_and_drink",
          id: 1,
          parent: ""
      }
   }
};

Would implementing a while loop be appropriate for this task?

javascript json

Answer 1

Answer №1

If you decide to go with vanilla JS only.

1a. Going the loop route:

function findLastParentElement(el) {
    var parentElement = el,
        notFound = true;
    while (notFound) {
        if (parentElement.parent) {
            parentElement = parentElement.parent
        } else {
            notFound = false;
        }
    }
    return parentElement;
}

1b. Opting for recursion instead (remember to watch out for call stack size, as a new function pointer is created each time):

function findLastParentElement(el) {
    if (el.parent) {
        return findLastParentElement(el.parent)
    } else {
        return el
    }
}

2a. Embracing recursion again (using a loop will lead to a code similar to point 1):

function getAllElementsAsArray(el, acc) {
    acc.push(el);
    if (el.parent) {
        return getAllElementsAsArray(el.parent, acc);
    } else {
        return acc;
    }
}
var result = getAllElementsAsArray(root,[]);

Answer 2

If you decide to go with vanilla JS only.

1a. Going the loop route:

function findLastParentElement(el) {
    var parentElement = el,
        notFound = true;
    while (notFound) {
        if (parentElement.parent) {
            parentElement = parentElement.parent
        } else {
            notFound = false;
        }
    }
    return parentElement;
}

1b. Opting for recursion instead (remember to watch out for call stack size, as a new function pointer is created each time):

function findLastParentElement(el) {
    if (el.parent) {
        return findLastParentElement(el.parent)
    } else {
        return el
    }
}

2a. Embracing recursion again (using a loop will lead to a code similar to point 1):

function getAllElementsAsArray(el, acc) {
    acc.push(el);
    if (el.parent) {
        return getAllElementsAsArray(el.parent, acc);
    } else {
        return acc;
    }
}
var result = getAllElementsAsArray(root,[]);

Answer 3

Answer №2

If you seek recursivity, look no further. Follow these steps:

#1 Develop a function that checks if an object contains any data in its parent property.

#2 If there is data within your object's parent, proceed to iterate through it. Iterate(OBJ.parent)

#3 When the object is devoid of any data, consider it as the final element (return OBJ).

Once you tackle this issue, challenge yourself by attempting to resolve it with multiple parents/nodes and display all elements in the last nodes.

foo: {
        caption: "Italian",
        code: "",
        id: 17,
        parent: {
           caption: "Restaurants",
           code: "",
           id: 9,
           parent:[ {
              caption: "Chairs and Tables",
              code: "chairs_and_tables",
              id: 2,
              parent: ""
           },
           {
              caption: "Food and Drink",
              code: "food_and_drink",
              id: 1,
              parent: ""
          }]
       }
}

Answer 4

If you seek recursivity, look no further. Follow these steps:

#1 Develop a function that checks if an object contains any data in its parent property.

#2 If there is data within your object's parent, proceed to iterate through it. Iterate(OBJ.parent)

#3 When the object is devoid of any data, consider it as the final element (return OBJ).

Once you tackle this issue, challenge yourself by attempting to resolve it with multiple parents/nodes and display all elements in the last nodes.

foo: {
        caption: "Italian",
        code: "",
        id: 17,
        parent: {
           caption: "Restaurants",
           code: "",
           id: 9,
           parent:[ {
              caption: "Chairs and Tables",
              code: "chairs_and_tables",
              id: 2,
              parent: ""
           },
           {
              caption: "Food and Drink",
              code: "food_and_drink",
              id: 1,
              parent: ""
          }]
       }
}

Uncover and control nested objects in JSON data

Answer №1

Answer №2

#1 Develop a function that checks if an object contains any data in its parent property.

#2 If there is data within your object's parent, proceed to iterate through it. Iterate(OBJ.parent)

#3 When the object is devoid of any data, consider it as the final element (return OBJ).

Similar questions

Is there a way to activate an event when using # or @ in a text field on React/Next.js?

Why isn't the login redirect script working without any errors or redirection?

Developing a jsp page with interconnected drop down menus

Utilizing a modular perspective in JavaScript to load JSON files as a view

Issue with JavaScript code for Google Maps API not functioning as expected

How can I design unique navigation menus using HTML, CSS, JavaScript, and jQuery?

Marionette - Apply a class to the parent ItemView's tagname

three.js fur effect not appearing on screen

ASP.NET can have issues with the functionality of jQuery AJAX

Is there a way to make an accordion close from a nested component in react?

Evaluate One Input Value to Determine Another Input Value

What are the steps to start using the Intersection Observer API right away?

Error: The 'price' property is undefined and cannot be read at path C:NODEJS-COMPLETE-GUIDEcontrollersshop.js on line 45, character 37

Trouble with rendering inline images from markdown files in GatsbyJS

Ensuring scope safety in jQuery AJAX requests

Implementing Dual Submit Buttons in Node.js using Express Framework

What is the optimal method for generating numerous records across various tables using a single API request in a sequelize-node.js-postgres environment?

How can I attach a cookie to a div that becomes visible after a few seconds of video playback?

Exploring the world of JSON communication through MVC Web API: A comprehensive guide

What is the purpose of using square brackets in the angular.module() function in AngularJS?