Initial Impression

We have been discussing variables, constants and data types. I wanted to take a moment to speak about initialization of data. Each language might do this a touch differently, but they all have a way to initialize data.

So what is initialization? It simply means putting content into your variable or constant. In JavaScript, it is done like this…

[code lang=”js”]
var testVar = "I am initialized!";
[/code]

If you do not initialize your variables, you could end up receiving undefined errors within your program. So if you use a variable that you do not initialize, take care to test it prior to using it.

JavaScript constants always need to be initialized when they are created.

So what does an uninitialized variable look like?

[code lang=”js”]
var testVar;
[/code]

That’s it.

A good practice would be to initialize all of your variables at least with a default value. For example, say I am writing a program where I am collecting someone’s age. I could initialize it as follows…

[code lang=”js”]
var myAge = 0;
[/code]

I start it off with a zero (0) because I know that know one is going to say they are zero years old, unless we have some sort of prebirth genius that can use computers from the womb and that is just weird. So, now I can test the variable in my code. I can check to see if the value of it is zero (0). If it is, then the end user has not told me how old they are…maybe they are ashamed?

Happy Coding!

Clay

More To Explore

computer, laptop, work place-2982270.jpg
Code

Unlocking Wireless Communication: A Dive into the Bluetooth API

Wireless communication has become an integral part of our daily lives, and Bluetooth technology is at the forefront of this revolution, enabling devices to exchange data over short distances and creating a world more interconnected than ever before. At the heart of this technology lies the Bluetooth Application Programming Interface (API), a powerful tool for developers looking to harness the capabilities of Bluetooth in their applications. In this blog post, we’ll explore what the Bluetooth API is, how it works, and the possibilities it opens up for innovation in wireless communication.

lighthouse, beacon, atlantic-8578318.jpg
Code

Understanding the Beacon API: Simplifying Asynchronous Data Transfers

In today’s data-driven world, web applications often need to send data back to the server. Traditionally, this has been done using AJAX requests or similar methods. However, these techniques can come with a cost, especially when dealing with data that needs to be sent during the unload phase of a document, such as tracking and diagnostic data. This is where the Beacon API shines by allowing developers to send data to a server more reliably and efficiently.

Share This Post

small_c_popup.png

Need help?

Let's have a chat...


Login

Jump Back In!

Here at Webolution Designs, we love to learn. This includes sharing things we have learned with you. 

Register

Begin Your Learning Journey Today!

Come back inside to continue your learning journey.