DEV Community: Ayesha Ali

⚡Two Ways to Merge Arrays in JavaScript

Ayesha Ali — Fri, 18 Feb 2022 11:55:05 +0000

Hi Everyone 👋

I am here to discuss with you Spread operator "..." And .Concat()
method in JavaScript.

⚡Here are 2 ways to combine your arrays and return a NEW array. I
like using the Spread operator, but if you need older Browser
support you can go through .Concat().

⚡Spread is fantastic when you know beforehand that you're dealing
with arrays. But what happens when the source is something else.

✍️Lets walk through an example,
const isArray = [1,2,3];
const notArray = 'random';

And we want this output : [1, 2, 3, 'random']

Here using spread operator the output comes
😱 [ 1, 2, 3, 'r', 'a', 'n', 'd', 'o', 'm' ]

And with .concat it works fantastic
✅ [ 1, 2, 3, 'random' ]

Note !!
So here's the quick rule. If you know you're dealing with arrays, use spread. But if you might be dealing with the possibility with a non-array, then use Concat to merge an array. 👍

⚡Use of 'include' Method in JavaScript

Ayesha Ali — Fri, 04 Feb 2022 12:11:33 +0000

Hey guys, Hope you are all well.
Let's discuss 'include' method in JavaScript .It has many uses we talk about one of them here.

▶ Use 'include' method for multiple Criteria.

If you have to check a lot of conditions in your "if" then instead of extending the statement with more " || " or operator, Write your condition by using Array. include.

Shorter and more declarative !

First Post

Ayesha Ali — Thu, 20 Jan 2022 13:19:48 +0000

Hi 👋, Dev Community

I am Ayesha Baloch, an undergraduate student of software engineering at Mehran UET Jamshoro. I have 1year+ experience in front-end development. I also worked in Java and C++ with on multiple projects. Currently I am learning Mern-Stack .
Would like to explore more to the dev community and wanna create network with different dev's 🙌💖

⚡Var, Let, and Const in JavaScript

Ayesha Ali — Wed, 19 Jan 2022 19:18:09 +0000

Let’s briefly discuss the concept of Var, let, and Const in JavaScript.They are mostly asked In programming interviews, and we may somehow be confused about their differences and use them Viceversa.

♦var

This is the default: it creates a global scoped(can be accessed anywhere in the program) variable which can be reassigned or redeclared later on.

♦let

This was introduced in ES6 and it is the preferred way over using var. It creates a block-scoped(only accessed in a particular block in which it is declared) variable which can be reassigned but can’t be redeclared.

♦const

It was introduced in ES6 along with let. It also creates a block-scoped variable but this can’t be reassigned nor redeclared. const should be used when you don’t want to reassign a value later on.