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 ]