How to call Recursive function for array data Using Promises in Node Js - node.js

Question

I am trying to call the recursive function in my code. The loop executing first time, but recursive function which is called inside the function is not working.
Here is my code :
function buildDynamicMenu(elements,parentId)
{
branch =new Array();
elements.forEach(function(element){
if (element['parent_id'] == parentId) {
children = buildDynamicMenu(elements, element['menu_id']); //Recursive function not working
if (children) {
element['children'] =children;
}
branch = element;
}
});
return branch;
}
var parentId=0;
buildDynamicMenu(data); // Array data
I have added sample array which I am using for this logic, array has menu and Submenu Id, we have to call recursive function to loop through all sub array
Array
(
[0] => Array
(
[menu_id] => 1
[menu_name] => Home
[parent_id] => 0
[link] => #home
)
[1] => Array
(
[menu_id] => 2
[menu_name] => Web development
[parent_id] => 0
[link] => #web-dev
)
[2] => Array
(
[menu_id] => 3
[menu_name] => WordPress Development
[parent_id] => 2
[link] => #wp-dev
)
[3] => Array
(
[menu_id] => 4
[menu_name] => About w3school.info
[parent_id] => 2
[link] => #w3school-info
)
[4] => Array
(
[menu_id] => 7
[menu_name] => Javascript
[parent_id] => 2
[link] => #
)
[5] => Array
(
[menu_id] => 8
[menu_name] => Plugins
[parent_id] => 7
[link] => #plugin-dev
)
)

Answer 1

seems like this doesn't have a pointed buildDynamicMenu export. check if there is one in 'this'. try to assign the buildDynamicMenu function to some const and perform call to it.
Ok here is my demo func working very well in nodejs typescript:
function recursieve (p) {
console.log('in recursieve ', p);
if (p > 0) {
recursieve (--p);
} } recursieve (10);// rec call
So in my opinion there are two problems in your code:
1. 'this' was not pointed to the function.
2. recursieve condition, like the elements is empty, or id is no match.