Collect.js has() Method

The has() method in Collect.js is used to check whether the key exists in the collection or not. In JavaScript, the array is first converted to a collection and then the function is applied to the collection.

Syntax:  

data.has('key')

Parameters:  

• Key: This parameter holds a new operational value.

Return value: This method returns a Boolean value either True or False.

Below examples illustrate the has() function in Collect.js

Example 1: Here in this example, we take a collection and then using the has() function we check for the single value. 

Javascript

// Importing the collect.js module
const collect = require('collect.js');

const collection = collect({
  name : 'GeeksforGeeks',
  Field : 'Education',
  Address : 'Noida',
});

console.log(collection.has('name'));

Output:  

true

Example 2: Here in this example, we take a collection and then using the has() function we check for the multiple values.  

Javascript

// Importing the collect.js module
const collect = require('collect.js');

const collection = collect({
  name : 'GeeksforGeeks',
  Field : 'Education',
  Address : 'Noida',
});

console.log(collection.has('name', 'Field', 'Address'));

Output:  

true

Reference: https://collect.js.org/api/has.html