Collect.js keys() Method

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The keys() method is used to return all of the collection’s keys.

Syntax:

collect(array).keys()

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

Return Value: This method returns the collection keys.

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

Example 1:

const collect = require('collect.js'); 
  
const collection = collect({ 
    name: 'Rahul', 
    dob: '25-10-96', 
    section: 'A', 
    score: 98, 
}); 
  
const keys_val = collection.keys(); 
  
console.log(keys_val.all());

Output:

[ 'name', 'dob', 'section', 'score' ]

Example 2:

const collect = require('collect.js'); 
  
let obj = [ 
    { 
        name: 'Rahul', 
        dob: '25-10-96', 
        section: 'A', 
        score: 98, 
    }, 
    { 
        name: 'Aditya', 
        dob: '25-10-96', 
        section: 'B', 
        score: 96, 
    }, 
    { 
        name: 'Abhishek', 
        dob: '16-08-94', 
        section: 'A', 
        score: 80 
    }, 
    { 
        name: 'Rahul', 
        dob: '19-08-96', 
        section: 'B', 
        score: 77, 
    }, 
]; 
  
const collection = collect(obj); 
  
const keys_val = collection.keys(); 
  
console.log(keys_val.all());

Output:

[ 0, 1, 2, 3 ]

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