The only() method is used to return the items from the given collection with the specified keys. It takes the key as a parameter and returns the item mapped with that key.
Syntax:
collect(array).only(key)
Parameters: The collect() method takes one argument that is converted into the collection and then only the () method is applied to it. The only() method holds the key as a parameter.
Return Value: This method returns the items from the given collection with the specified keys.
Module Installation: Install collect.js module using the following command from the root directory of your project:
npm install collect.js
The below example illustrates the only() method in collect.js:
Example 1: Filename: index.js
// Requiring the module
const collect = require('collect.js');
// Sample values array
let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9];
// Creating collection object
const collection = collect(arr);
// Function call
const only_val = collection.only([2, 5, 25]);
// Printing the values
console.log(only_val.all());
Run the index.js file using the following command:
node index.js
Output:
[ 2, 5 ]
Example 2: Filename: index.js
// Requiring the module
const collect = require('collect.js');
// Creating collection object
const collection = collect({
name: 'Rahul',
dob: '25-10-96',
section: 'A',
score: 98,
});
// Function call
const only_val = collection.only(['name', 'dob']);
// Printing the values
console.log(only_val.all());
Run the index.js file using the following command:
node index.js
Output:
{ name: 'Rahul', dob: '25-10-96' }
