Hello Debug Ducker here, and I have a question. I am sure you are familiar with a 404 error code, as you may have run into it while surfing the web. 404 Not Found means that the server on the other end couldn’t find what it was looking for, and this is cause the URL is not recognized. This can happen when the webpage is no longer available and you tried connecting to it. 404 is quite the common error, that I believe many have seen at least once but would you be able to tell me what other errors you may have encountered in the web, there is quite a few and some obscures ones you may have never seen.

Perhaps you also wondered why 404 is even an error number, why the number is the way it is, why use those specific numbers. Well you see 4xx is specifically for client errors, which means they are errors on your end and not the server. If a server would to have an error than it would use 5xx instead. For example, there is the 500 error code that is an internal server error which just means something messed up in the server and sent you that as a response. Basically each response code are in different categories, with the error categories coming entirely from 4xx and 5xx.

Now here are ones you know and some obscure ones

400: Bad Request, as in the server could not process the request, either because of a syntax error such as misspelling something

402: Payment Required, says what is on the tin you need to pay, not often used

409: Conflict, the request conflicts with something within the server

414: The URI too long, the URI is long and the server is not willing to handle it

418: I’m a teapot…yeah I don’t understand this one, and yes this is real

There are many of these errors code for 4xx and I would recommend you check it out with the link below.

There are also some 500 server errors, that are interesting such as

501: Not Implemented, as in the request has not been implemented, so exactly what it says

503: Service is Unavailable, just means the server are down.

And Many More.

Thre are a fascinating amount of error codes for some interesting stuff and I reccomend you see a bunch in the link below.

https://developer.mozilla.org/en-US/docs/Web/HTTP/Status

Anyway have a nice error free day day.

MozDevNet. “HTTP Response Status Codes – HTTP: MDN.” MDN Web Docs, developer.mozilla.org/en-US/docs/Web/HTTP/Status.

“HTTP Status Codes: All 63 Explained – Including FAQ & Video.” Umbraco, umbraco.com/knowledge-base/http-status-codes/#http-status-code-categories.

From the blog CS@Worcester – Debug Duck by debugducker and used with permission of the author. All other rights reserved by the author.

This article doesn’t fully dispose of mocking but gives ideas when it’s good to use. It gives a variety of examples including “Isolating the unit under test from other components or dependencies that are not relevant to the test, Speeding up the test execution by avoiding network calls or database queries that can be slow or unreliable, and Controlling the test input and output by creating predictable and consistent data that can be easily verified”. These ideas are then counterposed to the negatives such as “Introducing errors or inconsistencies between the mock data and the real data, which can lead to false positives or false negatives in the test results, Reducing the coverage and confidence of the test, by not testing the actual behavior and logic of the external source or the interaction with it, and Increasing the maintenance and complexity of the test, by requiring extra code and logic to create and manage the mock data”. The flaws of mocking data are mainly it does not use real data making it much more different from the real data creating disparities between the two. These tests ignore scenarios with much more complexity and these error and bugs can go unseen. The author assures the reader to use a data source to improve the tests.

After reading this article it gave me insight into the negatives of using mocking. The week prior activities made the use of mocking reduce time in creating classes but it’s good to know when it should be used and when it shouldn’t. I wish there was a perfect solution for every test but to find bugs in your code you must expand your horizon. Reading this article made me see that a variety of tests testing different things can overall benefit you. You never have to completely ignore a type of test but being able to see the positives and negatives can save you in the long run. Plus it will allow you to have a broader knowledge knowing that this may have flaws but there are things I can add to have a satisfactory end product.       

From the blog CS@Worcester – DCO by dcastillo360 and used with permission of the author. All other rights reserved by the author.

In this blog post, I wanted to look more into JavaScript since I didn’t really know too much about it. I struggled with the backend homework we had because I never knew anything about the syntax or language at all. So, I want to learn a bit more about this language within this blog. For this, I consulted this website, and gave it a good hearty read:

https://developer.mozilla.org/en-US/docs/Web/JavaScript

This site gives an overview of JavaScript and the applications in which it is used in general, and what benefits and downsides it has compared to other languages.

What I found very interesting is that I originally knew that JavaScript was mainly used for website development and coding, but this site gave some examples of applications such as Node.js and Adobe Acrobat. I believe we’ve actually utilized Node.js before in our classes, but I can’t quite put my finger on what exactly we used it for, but I recgonize the name appearing in one or more of the repositories we’ve been working with.

It seems like JavaScript is much like Java in the sense that it can use object oriented code, but I think the similarities between the two end there. In the past, I always heard that JavaScript was a completely different beast from Java, and after look more into it, I see why. This site below describes the differences:

https://www.lighthouselabs.ca/en/blog/java-vs-javascript

JavaScript it object-orientedcode, whereas Java is object-based. That may sound the same as each other, but there is some very specific distinctions between them. Java relies on objects to function, whereas JavaScript has functionality for objects and suggests use of them with it’s language, it is not required. JavaScript is also a lot more fluid with it’s syntax, and has a lot more free-form and flexibility with it, which reminds me a lot of what I’ve heard about Python. Java is a lot more rigid, and requires specific pre-set uses of it’s syntax.

But back to JavaScript, it seems like its The language for web design, as a lot of it’s language is made with web design in mind. My future for this area of study is some form of design in technilogical areas, so it would be possible I go into Web Design. If I do, I’ll definitely have to teach myself more JavaScript. It seems like a really useful language to have on hand in that case.

I will be posting one other blog today, using another token, so stay tuned for another!

From the blog CS@Worcester – You're Telling Me A Shrimp Wrote This Code?! by tempurashrimple and used with permission of the author. All other rights reserved by the author.

JavaScript’s implementations within the web, mobile application, and game development make the scripting language worth learning. You can do so via learning platforms like BiteDegree or by exploring free JavaScript templates and applications on code hosting platforms like GitHub.  

What is the use of JavaScript?

JavaScript has continued to grow alongside new browsers like Mozilla Firefox and Google Chrome since then. The latter even started developing the first modern JavaScript engine, called V8, which compiles bytecode into native machine code. Today, JavaScript has plenty of frameworks and libraries to simplify complex projects, such as AngularJS, jQuery, and ReactJS. While it caters to web-based programs the most, JavaScript programming features have other implementations in different areas. The following are several basic uses of JavaScript.

The development of JavaScript frameworks, consisting of JavaScript code libraries, allows developers to use pre-written JavaScript code in their projects. It saves them time and effort from having to code programming features from scratch. Each JavaScript framework has features that aim to simplify the development and debugging process.

For example, front-end JavaScript frameworks like jQuery and ReactJS improve design efficiency. They allow developers to reuse and update code components without affecting each other, function or value-wise. The implementation of JavaScript code in Node.js also plays an important role in web development. Node.js can reduce server response time due to its single-threaded nature and non-blocking architecture and omit delays.

One of JavaScript’s core functions is adding dynamicity to web pages. This includes displaying animations, modifying text visibility, and creating dropdown menus.

While you can use only HTML and CSS code to build a website, it will only have a static display. With JavaScript, a user can interact with web pages and have a better browsing experience.

Additionally, JavaScript lets you change HTML content and attribute values without reloading the web page first. This is because JavaScript supports the following data types:

• String ‒ consists of textual data written inside quotes. For example, “Hello world”, ‘Hello world’, and “Display ‘Hello world’ text”.
• Number ‒ covers integer and floating-point numbers between (2^53 – 1) and -(2^53 – 1).
• Boolean ‒ a logical data type with true and false values.
• BigInt ‒ represents integer data of arbitrary length.
• Null ‒ contains a null value.
• Undefined ‒ includes declared but not assigned variables.
• Symbol ‒ provides unique identifiers for objects.
• Object ‒ for complex data structures written with curly braces. For example, {item:”Book”, information:”biography”}.

I chose to talk about JavaScript because it’s one of the most fundamental in programming and as computer science, I am supposed to know about JavaScript because it’s mostly used and also very important.

What is JavaScript used for? | Hack Reactor

What Is JavaScript? A Basic Introduction to JS for Beginners (hostinger.com)

From the blog CS@Worcester – Gracia's Blog (Computer Science Major) by gkitenge and used with permission of the author. All other rights reserved by the author.

;; Make rinari jump to/from javascript source files and specs.
(setcdr (assoc 'javascript rinari-jump-schema)
        '("j"
          (("app/assets/javascripts/\\1.js" . "spec/javascripts/\\1_spec.js")
           ("spec/javascripts/\\1_spec.js"  . "app/assets/javascripts/\\1.js")
           (t . "spec/javascripts/.*")
           (t . "app/javascripts/.*"))
          t))
(rinari-apply-jump-schema rinari-jump-schema)

Now I can press C-c ; f j to jump between a javascript file in
app/assets/javascripts/ and its jasmine test file in
spec/javascripts/. Perhaps I shouldn’t be overwriting the
predefined (but not very useful) javascript jump settings, but I
really wanted to use the j key.

From the blog dthompson by David Thompson and used with permission of the author. All other rights reserved by the author.

If you want a quick TL;DR: I think AngularJS is good, but it has a
steep learning curve and there’s no well defined set of best
practices.

Note: I will be using plenty of terms that will probably only make
sense for people that have used AngularJS.

From the blog dthompson by David Thompson and used with permission of the author. All other rights reserved by the author.