Underscore.js _.iterators.Tree() Method

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