Myriam  Rogahn

Myriam Rogahn


Creating a Range in JavaScript

Have you ever worked on a problem where you needed to make a list of all the numbers between two inputs and manipulate them in some sort of way? Recently, I found myself in just this predicament and thought that JavaScript would have a nice and easy built in function to make the process easier, like Ruby does. I was surprised to find that there is nothing similar to the simple built in Ruby Range method, and quite a bit of different ways to accomplish this in JavaScript.

In Ruby, you can build a new array from ranges by using the built in method .to_a or the Array method. If we need to create a range of years from 2010 to 2020, you would do it like (2010..2020).to_a or Array (2010..2020) . Inside the parenthesis we are giving Ruby two numbers and two dots, which Ruby interprets as creating an inclusive range from 2010 to 2020.

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As seen above, and inclusive range creates an array for of all the numbers between and including the ones that invoked it.

Ruby also allows us to call the same two methods with three dots, which would create a new array that would exclude the specified highest value.

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Calling our range method with three dots 2010...2020 creates an array for all the numbers from 2010–2019, and does not include 2020. As you can see, very easy and simple to create a range with specified parameters. In Ruby, the range functionality doesn’t only stop at numbers! Letters, conditionals, and even intervals can all use the built in range methods to produce some easy to read and compute functionality in our code.

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Now, back to our JavaScript range issue. JavaScript does not have a two/three dot notation for creating ranges, however we could use the Ruby examples and create our own. In Ruby, the .to_a and the Array methods are built-in methods for creating new Arrays. So our JavaScript code could use the same foundation, and create a new Array to store all our numbers in. Next, using a for loop, we could loop through the numbers and push them into the array until we reach our higher number and break the loop.

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If we wanted to make our JavaScript code act like a Ruby exclusive range, our second argument in the for loop would change to i < 2020. While this is great, our use for continuously returning a range from 2010 to 2020 is rather limited. Our next change would be to write this to accept arguments, so that the code could perform a variety of tasks, and not just for this past decade. Writing this to be more dynamic would involve making a function that takes in two arguments for our range numbers.

#beginners-guide #javascript #python

What is GEEK

Buddha Community

Creating a Range in JavaScript

Rahul Jangid


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!");

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"); */


Advantages and Disadvantages of JavaScript

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

CSS Boss

CSS Boss


How to create a calculator using javascript - Pure JS tutorials |Web Tutorials

In this video I will tell you How to create a calculator using javascript very easily.

#how to build a simple calculator in javascript #how to create simple calculator using javascript #javascript calculator tutorial #javascript birthday calculator #calculator using javascript and html

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

Book Free Interview:

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Niraj Kafle


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

Create a Line Through Effect with JavaScript

In this post, we are going to create an amazing line through effect, with help of CSS and lots of JavaScript.

So, head over to your terminal and create a folder LineThroughEffect. Create three files -index.htmlmain.js and styles.css inside it. We are also opening the files in VS Code.

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VS Code

Now, we will add the basics html in index.html and also link both css and js files. We have very little html in this project, with div with id of line and an h1 with an id of text.

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#javascript-projects #javascript-tips #javascript #javascript-development #javascript30