DEV Community: Waqas Rahman

Get last element of array in JavsScript

Waqas Rahman — Tue, 18 Jan 2022 17:31:02 +0000

Whatever the programming language you code in ,I am sure you will be playing with arrays every day. So today we will be looking at options we can get the last element of an array in Javascript.

METHOD 1:INDEXING

When You know the lenght of the array:

Say we have the following array

var myArr = ['Apple', 'Orange', 3, 4, 'Football', 'Cricket'];
So as we know that arrays are zero-indexed in programming, which means that the first element is placed at zero position(Dont tell this to your non-programmer friend). So we just need to count the number of element in the array, which is six(6) in our case so

console.log(myArr[5])

will print the last element('cricket') for us. Easy Right. Now let's buckle up for the hard part.

METHOD 2:USING length FUNCTION

If the array is uncountable for human or coming as function argument than we can use javascript length function to get the last element. This will be like

console.log(myArr[myArr.length - 1])

myArr.length will give us the array lenght and 1 less from lenght will give the index of last element of the array.

METHOD 3: USING .pop() FUNCTION

We can get the last element of array with .pop() function like this

let last =myArr.pop()
console.log(last)

But there is a problem with this function as our array will be reduced to five items now as last element is popup out by the function. But if you were to use the array in your code again, you can have a copy of the array.

let myArray2 = myArr
let last =myArr.pop()

So now myArray2 have all the elements of original array and you can perform any task you want.

How much of NodeJS is enough ?

Waqas Rahman — Mon, 25 May 2020 05:32:03 +0000

Back in January this year I started learning NodeJS.
I have developed many application while working with Modules like
Sockets,EJS,Passport, Express,Mongoose,Express-valditor, Body-Parser ...

I have worked on Session management, CRUD Operations ,Real Time Chat Application ,Secure Login with PassportJS

And the main point is now I want to start learning react as at industry level most of them looking for MERN developers So am I ready to go to react or still I need to spend some time with Node.
My GitHUB Profile

Thanks in Advance !!!

Please help

Waqas Rahman — Wed, 01 Jan 2020 13:47:16 +0000

Dec 11 '17 Comments: 1 Answers: 1

this is the error i am getting

400. That’s an error.

Error: invalid_request

Invalid parameter value for approval_prompt: 'auto'' is not valid

Request Details

response_type=code
access_type=offline
client_id=xyz-
xyx.apps.googleusercontent.com
redirect_uri=http://localhost/xyz/init/googleCallBack.php
state=scope=https://www.googleapis.com/auth/plus.me
approval_prompt=auto'

here is the config for google login

$gClient= new Google_Client();
$gClient->setAuthConfig('init/client_secret.json');

$gClient->setApprovalPrompt('consent');
$gClient->setApplicationName('abc');
$gClient->setAccessType('offline');
$gClient>setRedirectUri('http://localhost/xyz/init/googleCallBack.php';
$gClient->setScopes(Google_Service_Plus::PLUS_ME);

i tried setting…

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