javascript - Calling same function in multiple object's context? -

i have object structure so;

{    this.parent = undefined;    this.children = []; } 

all values in children have same structure above except parent would reference object has child.

how can iterate on children of children etc in child's object context?

i know how can loop children 1 object

obj.children.foreach(function(child) {  }); 

but how can iterate children of children, when children 10-20-30 deep heirachy?

use recursion.

function deepforeach(node, fn) {     fn(node);     node.children.foreach(function(child) {         deepforeach(child, fn);     }); }  deepforeach(obj, function(obj) {     console.log(obj); }); 

the way works becomes evident if state in plain english:

• if there no children, call callback node. (base case)
• if there children, first deal ourself, , whole procedure each child.

this type of recursion called preorder traversal.