With the help of _.iterators.Tree() method, we can get the iterator which can return each and every value in a tree one by one and take input as array having different dimensions by using this method.
Syntax:
_.iterators.Tree( array )
Return Value: It returns the value from iteration function.
Note: To execute the below examples, you have to install the underscore-contrib library by using this command prompt we have to execute the following command.
npm install underscore-contrib
Example 1: In this example, we can see that by using _.iterators.Tree() method. We are able to get the values from iteration function one by one from tree whenever iteration function is invoked.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');   var geek = _.iterators.Tree(["A", ["C"], ["B", ["D"]]]);   for(var i = 0; i < 5; i++) {     console.log(geek()); } |
Output:
A C B D
Example 2:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');   var geek = _.iterators.Tree([1, 5, [3], [2, [4]]]);   for(var i = 0; i < 5; i++) {     console.log(geek()); } |
Output:
1 5 3 2 4
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