Collect.js prepend() Method

The prepend() method is used to add an item at the beginning of the given collection.

Syntax:

collect(array).prepend(value)

Parameters: The collect() method takes one argument that is converted into the collection and then prepend() method is applied on it. The prepend() method holds the values that you want to prepend into collection.

Return Value: This method returns the collection elements.

Below example illustrate the prepend() method in collect.js:

Example 1:

Javascript

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

const collection = collect(['Geeks', 'GFG', 'GeeksforGeeks']);

collection.prepend('Welcome');

console.log(collection.all());

Output:

[ 'Welcome', 'Geeks', 'GFG', 'GeeksforGeeks' ]

Example 2:

Javascript

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

let obj = [
    {
        name: 'Rahul',
        dob: '25-10-96'
    },
    {
        name: 'Aditya',
        dob: '25-10-96'
    },
    {
        name: 'Abhishek',
        dob: '16-08-94'
    }
];

const collection = collect(obj);

collection.prepend({ name: 'Ashok', dob: '15-12-91' });

console.log(collection.all());

Output:

[
  { name: 'Ashok', dob: '15-12-91' },
  { name: 'Rahul', dob: '25-10-96' },
  { name: 'Aditya', dob: '25-10-96' },
  { name: 'Abhishek', dob: '16-08-94' }
]