Collect.js flatten() Method

Collect.js is a wrapper library for working with arrays and objects which is dependency-free and easy to use. The flatten() method is used to flatten a multi-dimensional collection into a single dimensional collection and returns the flatten single dimensional collection elements.

Syntax:

collect(array).flatten()

Parameters: The collect() method takes one argument that is converted into the collection and then flatten() method is applied on it.

Return Value: This method returns the flatten single dimensional collection elements.

Example 1: Below example illustrates the flatten() method in collect.js

HTML

const collect = require('collect.js');

let obj = [
    {
        name: 'Rahul',
        score: 98,
    },
    {
        name: 'Aditya',
        score: 96,
    },
    {
        name: 'Abhishek',
        score: 80
    }
];

const collection = collect(obj);
const flatten_Val = collection.flatten(1);
console.log(flatten_Val.all());

Output:

[ 'Rahul', 98, 'Aditya', 96, 'Abhishek', 80 ]

Example 2:

html

const collect = require('collect.js');

let arr = [
    ['Geeks', 'GFG', 'GeeksforGeeks'],
    [10, 20, 30, 40, 50]
];

const collection = collect(arr);

const flatten_Val = collection.flatten(1);

console.log(flatten_Val.all());

Output:

[ 'Geeks', 'GFG', 'GeeksforGeeks', 10, 20, 30, 40, 50 ]