Lara Baldwin

Lara Baldwin

1592621280

Inbuilt JavaScript method map() explained!

In this video, I talk you through the inbuilt JavaScript method map().

I think it is important to show a theoretical example of how the method works, but then also go through it in action with a real-life project. My real-life project for this video is a financial dashboard I make in React.js for the front end and Django + Python for the backend. I will show you the map() method being used to map our transactions in my React.js frontend.

I hope it’s useful!

#javascript #react #web-development #programming #developer

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Buddha Community

Inbuilt JavaScript method map() explained!
Giles  Goodwin

Giles Goodwin

1600884720

Maps in JavaScript

What topics we are going to cover?

  1. What are Maps?
  2. What are the methods used in it and how we can insert or retrieve values to it?
  3. How Maps works, behave with loops and what is happening behind the scenes?

What are Maps?

By the word Map, here I mean another new method which is being used these days in modern JavaScript. Here we are going to see the classic dataType of Map. Mostly Map is getting used in looping concepts that’s a great thing, but if you go directly for all those then you won’t be able to understand the classic dataType of Map.

So let’s fire up our code editor and understand the concepts of Map with some amazing examples.

var myMap = new Map();

This is almost kind of constructional approach, where we create an object from prototype and stuff like that.

What are the methods used in Maps?

Now Map has a lot of properties and I think you should take a look at it, at once. So whenever you gonna type myMap. then you can see a list of methods will be appearing on your screen like- get, set, forEach, values, and bunch of things. So one of the common methods which are being used widely is set and get method and by this time I guess from its name itself you might have guessed it like these are some default setters and getters means it can add values to them and retrieve values from them.

How to insert values in Maps?

Let’s go ahead and try with set() method and have some of the fun together:

Note: They work almost like objects but remember this, Maps are not like objects, they are completely different.

var myMap = new Map();
myMap.set(1, "Ricky"); //myMap.set(any key, any value)
myMap.set(2, "Monty"); //myMap.set(any key, any value)
myMap.set(3, "Henna"); //myMap.set(any key, any value)
myMap.set(4, "Monta"); //myMap.set(any key, any value)
console.log(myMap);

Now if you try to run this code in your editor, then you gonna see an output like this on your screen.

Map(4) { 1 => 'Ricky', 2 => 'Monty', 3 => 'Henna', 4 => 'Monta' }

Notice here, how Maps by default itself is telling you that how many properties you are storing in it and one more thing you can see here they have used => these arrow between its key, value pair to differentiate, and make you understand that they are not your regular objects.

#javascript-development #maps #array-methods #arrays #javascript

Rahul Jangid

1622207074

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

  • For single line comment in JavaScript we have to use // (double slashes)
  • For multiple line comments we have to use / * – – * /
<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Hire Dedicated JavaScript Developers -Hire JavaScript Developers

It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.

Does your business need an interactive website or app?

Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.

The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.

Get your business app with JavaScript

For more inquiry click here https://bit.ly/31eZyDZ

Book Free Interview: https://bit.ly/3dDShFg

#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers

Niraj Kafle

1589255577

The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips

Part 4 : ES6 JavaScript : Map Collection in Javascript | Map Methods | Map vs Object

Javascript  : Map Collection in Javascript | Map Methods | Map vs Object

  • What is Map ?
  • How to Create Map ?
  • Map Methods%
  • Map vs Object

#javascript #map  #collections #objective

https://www.youtube.com/watch?v=cCW-GY6UGJI