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Why « Polyglot Programming » or « Do It Yourself Programming Languages » or « Language Oriented Programming » sucks?

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Last year we saw the launch of a new Web programming language Dart – Structured Web Programming from Google. A very interesting approach to support web application development. Not so long after Go, Groovy, Ruby, Scala, << Name your DSL here >>; we see Dart. Is it a good thing to have at least one programming language to solve one problem? The answer is, like we already know, it depends.

Stay Away From “Do it Yourself”

It is your choice as to if you will try to do things yourself or allow the truly seasoned professionals to help out. Some decide that they are going to try to go it alone when they are programming something new, but this often ends up in a less than desirable place. It may even be more expensive than just hiring an expert who can help you get it programmed for you in the first place.

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16 Free Websites for Learning to Code in 2021

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The best free online coding websites for beginners are hubs of education and insight, designed to take your knowledge and career to the next level.

For years, technical careers have been gaining more attention among innovative individuals. In a digital world, people capable of speaking computer language often have the widest selection of job opportunities. However, before you can start leveraging the blossoming job market, you need to hone your skills. That’s where free coding websites come in.

A free online coding website is an environment where you can develop your understanding of various kinds of code, update your programming prowess, and even earn certifications. Today, we’re going to be looking at some of the most impressive coding websites on the market.

Coding Careers: Opportunities in 2021 and Beyond

Before we leap into our overview of the best free coding websites, let’s examine why it’s so important to invest in your coding role. Looking at the US Bureau of Labor Statistics, we see that coders earn an average of $89,190 per year.

Elsewhere, CompTIA notes that technology hiring has accelerated since the end of 2020, with up to 391,000 new positions opening in the US during December.

Though coding careers have been popular for some time now, they have particularly high value following the pandemic, as companies worldwide adapt to the changes associated with remote workforces, digital customer service, and ecommerce. The pandemic has made us more reliant on technology than ever before, as a result:

  • Coding skills are in high demand: Coding skills are essential for the newly digital world. Studies find that the pandemic has accelerated digital transformation by around 7 years. Companies need coding professionals to stay ahead of the curve.
  • Coding knowledge is becoming more versatile: Companies are looking for coding skills in more than just programmers. They want their data analysts, IT workers, artists, designers, and other professionals to have these talents too.
  • People with coding talent can earn more: Jobs requiring coding skills tend to pay more than those that don’t. This reveals the growing need for coding knowledge in the digital ecosystem.

Coding skills provide an avenue to tech professionals for higher-income jobs, and these careers are growing faster on average than other job opportunities.

The Best Websites for Learning to Code

Learning to code or developing your existing coding skills can help you to unlock a host of new opportunities. Today, you can learn coding online for free, just by visiting the right websites.

Even a basic knowledge of coding can drive a range of results, such as helping to support the better management of websites, reducing reliance on outside developers, and opening the door to app development. So whether you want to start a new career or upgrade your existing knowledge, these sites will help:

BitDegree

BitDegree is a wonderful website for anyone interested in web development, coding, data science, and programming. There are various courses to choose from, depending on the career path you want to take. For instance, you can learn about the AWS cloud or start your journey into gaming development. For coding, BitDegree covers languages like:

  • CSS
  • HTML
  • PHP
  • SQL
  • JavaScript
  • jQuery

The best thing about BitDegree is how it makes learning so fun. There are gamified courses and sections where you can really dive into the essentials of coding. In addition, the online coding course collection often features hundreds of discounted options for people on a budget.

CodeAcademy

One of the most popular sites for learning how to code for free, CodeAcademy is home to over 24 million students who have built their skills. The interactive learning approach lets you apply what you’ve learned immediately. Over 300 million hours of free coding content are available to check out at your leisure. Like most coding platforms, you can learn languages such as:

  • CSS
  • JavaScript
  • HTML
  • PHP
  • jQuery
  • Python
  • PHP
  • Ruby

CodeAcademy is particularly effective for beginners because you get instant feedback after submitting your coding efforts. When you make mistakes, you’ll find out exactly where you went wrong, allowing you to avoid similar mistakes in the future.

Codewars

Codewars by Qualified is definitely one of the most versatile free platforms for learning how to code. There are dozens of languages you can learn – too many to list right here. Options range from C++ and C# to Ruby, Python, Lean, Java, PHP, Scala, and countless others.

Codewars teaches you your programming language in-depth by selecting challenges designed to put your mind to the test. The goal for each challenge is to help you sharpen your knowledge over time, with tasks that get progressively more difficult over time.

The cool thing about Codewars is it allows you to see how you respond to challenges compared to how other coders have tackled the same issues.

Code.Org

Designed for a younger community of would-be coders, Code.org is an engaging and highly accessible introduction to coding. With around 60 million students worldwide, the Code.org platform gives you access to a wide range of different learning opportunities intended to suit different needs and learning levels.

The Code.org environment is built on a desire to bring coding into the standard curriculum. You can dive into full one-hour tutorials, or you can experiment with a more structured approach to learning, which is ideal for people with different learning styles. There’s also a huge catalog of courses extending from basic coding for younger kids all the way to University-level education.

Free Code Camp

A diverse option in our free coding website list, Free Code Camp is all about developing your coding knowledge while simultaneously networking with other like-minded people in the industry. The solution allows you to learn coding by participating in challenges – which is ideal if you want to put your skills to the test as soon as possible.

To help you jump in, you’ll have access to a range of courses and tutorials designed to help you understand and overcome each challenge. You can even code for non-profits on the platform and build tradeable projects in languages like:

  • HTML5
  • Javascript
  • Node.JS
  • CSS3
  • React.JS
  • Databases
  • Git

If you’re a little nervous about the concept of coding alone, you’ll have a full community to work within the Free Code Camp. You might even meet someone you can work with in the years ahead.

Code Conquest

Code Conquest is less of a course website and more of a comprehensive guide for beginners diving into the world of code. This amazing platform will help you understand all of the basics of coding in no time – even if you’re brand-new to the landscape. You can find out what coding is all about, learn which languages are best to learn for your needs, and more.

The website is full of resources for all kinds of coders, including comprehensive tutorials, reviews, a knowledge center, training packs, and more. You can even choose from a range of languages like:

  • CSS
  • HTML
  • PHP
  • jQuery
  • Ruby
  • JavaScript
  • Python
  • MySQL

To help you figure out where you should get started, the Code Conquest website also gives you recommendations on which tutorials to take next.

W3Schools

One of the better-known free websites for coding on the market today, W3Schools is an environment packed full of example codes, resources, tutorials, exercises, and libraries to help you learn how to code. The site is one of the largest in the world for developers.

To begin coding with W3 Schools, you’ll need to choose the programming language that’s right for you, then either jump into the program immediately or select from a range of learning options. The site comes with a handy quiz to help you define your knowledge level.

Languages range from CSS to SQL, JavaScript, HTML, Python, Java, C++, and many more.

Code Avengers

Code Avengers offers a fun and interactive approach to learning how to program and code. There are various course options to teach you how to create everything from games and apps to entire websites. The good thing about the Code Avengers website is you don’t need a lot of spare time to start learning. Each course takes around 12 hours to complete.

You can choose from languages like HTML, CSS, Python, jQuery, JavaScript, and more, and connect with a wide selection of similar coding enthusiasts, just like you. The biggest downside is that the free trial only lasts for seven days before you’ll need to pay to use the full program.

The Code Player

A simple and effective website for learning how to code and building your existing skills. There are tons of videos and demos to walk you through the process of learning how to code from scratch. All you need to do is click on one of the things you want to learn how to do, like creating a simple web page, and the site will give you a video walkthrough.

Though a little simple compared to other coding resources, the Code Player still has a lot of great video guidance to help beginners jump into various languages. For example, you can learn about CSS and HTML or check out various tools to help you make a more effective website.

CodeGym

If you’re particularly interested in learning about Java, the CodeGym is probably the website for you. This online Java programming course teaches you the basics of Java by allowing you to dive into various tasks. You can get involved with various exercises depending on your existing skill level and play around with games designed to teach you more about the coding landscape.

This website is fantastic for people in all stages of the coding journey. Whenever you suggest a solution to a challenge, the website will give you immediate feedback to learn from. There are more than 500 hours of Java coding exercises and educational resources to explore.

The Odin Project

One of the better-known free coding websites on the market, the Odin Project aims to take the headaches and frustration out of learning web development. If you’re a beginner looking to develop a career in coding, then the Odin Project will give you all the pieces of the puzzle required to decide exactly where you want to go and build the appropriate skills.

This site offers a full-stack curriculum of coding education options, with tons of challenges, tasks, and exercises to help you put your newly gained knowledge to the test. You’ll learn how to program in languages like CSS and HTML, explore the basics of JavaScript and Ruby, and even get tips on how to get hired when your skills are maxed out.

Plural Sight

Previously known as Code School, Plural Sight is a fantastic online learning platform that allows you to build your knowledge through a range of paid and free courses. The comprehensive platform is organized into a wide selection of different learning paths. You can choose how you want to develop your skills based on your chosen language and your existing skillset.

You choose an education path created by professional instructors to achieve specific outcomes, and Plural Sight gives you all the material you need. You can also practice what you’ve learned during the course in your browser and get immediate feedback on what you need to work on. There’s even a gamification aspect that allows you to earn points for every course level you complete.

MIT Open Courseware

Imagine how amazing it would be to get accepted to MIT to learn your new coding skills? What if you didn’t have to go through the headache of an official application. If you have a computer and internet access, you can explore MIT’s course material easily through the MIT Open Courseware website. This dedicated website gives you an insight into all of the courses and materials learned by students at MIT.

You can browse through all the courses available in the programming landscape and filter through results based on things like course features. For instance, you might specifically look for courses with their own online textbook, lecture notes, and videos. It’s a great way to get an insight into how one of the most reputable universities in the world offers coding education.

Web Fundamentals

We’ve already looked at a website offering coding resources specifically for Java, now let’s take a look at one designed for HTML5. Launched about 11 years ago as HTML5 Rocks, the Web Fundamentals website is packed full of tutorials, resources, and insights into the most recent updates to HTML5. This open-source environment allows developers and programmers to really get active with their skills.

You can play around with some of the code already available on the website, and explore tutorials authored by a range of amazing individuals. Although these courses are very comprehensive, it’s worth noting that they might not be the perfect choice for true beginners, as the tutorials can be more complex than most.

Dash General Assembly

If you’re keen to learn the essentials of coding in some of the most popular languages, like CSS, JavaScript, and HTML, then Dash General Assembly is the site for you. This website offers fun and free courses which will guide you through the basics of web development. You even get interactive tasks and challenges you can leverage within your browser, with no downloads required.

Users learn how to do a range of amazing things with this website, including how to code HTML5, build a beautiful website, and balance your layouts for aesthetic appeal and usability. You can even design dynamic interfaces where you can add aminations and effects. Dash General Assembly is a fantastic tool for anyone keen to get started in the world of coding.

Codeasy.net

Finally, Codeasy.net promises beginners a fast and simple way to start learning how to code, while having plenty of fun. This exciting website immerses you within a digital story which takes you on an adventure through the basics of coding. You’ll need to learn real-life coding skills to navigate your way through the rest of the story, which means you can develop your C# knowledge as you go.

This is one of the more unique tools for learning how to code that we’ve found so far. It’s a great way to discover the basics of C# without being bogged down in boring lectures. Remember, though, this website is intended for complete beginners, so you might find it a little basic if you already know some of the coding essentials.

Free Websites for Learning to Code

Free coding websites are an excellent way to develop your skills and unlock new opportunities in the world of coding. If you’re keen to jump into a new career as a programmer or coding developer, make sure you check out some of the options above. There’s no doubt you’ll find a site capable of giving you the boost you need.

 

Featured image via Unsplash.

Source

The post 16 Free Websites for Learning to Code in 2021 first appeared on Webdesigner Depot.


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Big / Bug Data: Analyzing the Apache Flink Source Code

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Applications used in the field of Big Data process huge amounts of information, and this often happens in real time. Naturally, such applications must be highly reliable so that no error in the code can interfere with data processing. To achieve high reliability, one needs to keep a wary eye on the code quality of projects developed for this area. The PVS-Studio static analyzer is one of the solutions to this problem. Today, the Apache Flink project developed by the Apache Software Foundation, one of the leaders in the Big Data software market, was chosen as a test subject for the analyzer.

So, what is Apache Flink? It is an open-source framework for distributed processing of large amounts of data. It was developed as an alternative to Hadoop MapReduce in 2010 at the Technical University of Berlin. The framework is based on the distributed execution engine for batch and streaming data processing applications. This engine is written in Java and Scala. Today, Apache Flink can be used in projects written using Java, Scala, Python, and even SQL.

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Eta-Expansion and Partially Applied Functions in Scala

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This article is for Scala programmers who know at least these essential concepts: what a method is and how to define a function value (lambda). Here we’ll discuss the topic of eta-expansion and partially-applied functions, which are often loosely covered and piecemeal.

You can read this article over at the Rock the JVM blog in its original form or watch as video on YouTube or in the video below:

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A Simulation Using Sequential and Parallel Collections in Scala 2.13

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Introduction

Software to be build is to compare data from independent satellite systems.  As fighter jets traverse airspace, each system determines its identity, recording the name of the jet type or an equivalent letter or number abbreviation. For data collected over time, the simulation software must ascertain whether systems agree on identification and if so, whether contrasting the data by single or multiple processors would be more efficient.

This article begins with a proof of concept in Scala 2.12.   A small program with function taking generic collection type parameters verifies the basic strategy.  The actual software is written in 2.13, in which generic collection types – those inheriting the GenTraversable hierarchy – have been deprecated [1].  The parallel package is also gone but can be brought back [2].

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How to Create Controllable Futures in Scala

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This article is for the Scala programmer who has at least used or heard about Futures before. You can also find this over at the Rock the JVM blog or on YouTube in video form or embedded below:

In this article, I’m going to address the problem of "deterministic" Futures in Scala. You probably know by now that Futures are inherently non-deterministic, in the sense that if you create a Future
Scala

You know the value inside will be evaluated on "some" thread, at "some" point in time, without your control.

The Scenario

Here, I will speak to the following scenario which comes up often in practice. Imagine you’re designing a function like this:
Scala

with the assumption that you’re issuing a request to some multi-threaded service which, is getting called all the time. Let’s also assume that the service looks like this:
Scala

The service has two API methods:
  1. A "production" function that is completely deterministic.
  2. A submission function that has a pretty terrible API because the function argument will be evaluated on one of the service’s threads, and you can’t get the returned value back from another thread’s call stack.
Let’s assume this important service is also impossible to change, for various reasons (API breaks, etc). In other words, the "production" logic is completely fixed and deterministic. However, what’s not deterministic is when the service will actually end up calling the production function. In other words, you can’t implement your function as:
Scala

because spawning up the thread responsible for evaluating the production function is not up to you.

The Solution

Introducing Promises — a "controller" and "wrapper" over a Future. Here’s how it works. You create a Promise, get its Future and use it (consume it) with the assumption that it will be filled in later:
Scala

Then pass that promise to someone else, perhaps an asynchronous service:
Scala

And at the moment, the promise contains a value. Its future will automatically be fulfilled with that value, which will unlock the consumer.

How to Use it

For our service scenario, here’s how we would implement our function:
Scala

We create a promise and then we return its future at the end for whoever wants to consume it. In the middle, we submit a function that will be evaluated at some point out of our control. At that moment, the service produces the value and fulfills the Promise, which will automatically fulfill the Future for the consumer.
This is how we can leverage the power of Promises to create "controllable" Futures, which we can fulfill at a moment of our choosing. The Promise class also has other methods, such as failure, trySuccess/ tryFailure and more.
I hope this was useful!

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Beginners Guide to Mocking in Scala

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We all know that unit test cases are one of the most important parts of an application. No? Then, I must tell you that unit testing is one of the earliest tests to be performed on the unit of code, and the earlier the defects are detected, the easier it is to fix. It reduces the difficulties of discovering errors contained in more complex pieces of the application.

So where does mocking come into the picture? Why do we need it? And how do we understand what we should mock while writing unit test cases? Answers to these questions are right below in this blog.

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High-Performance Functional Programming Through Effect Rotation

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As I covered in a previous post, monad transformers have poor performance properties in languages and runtimes unequipped to deal with them — including the Scala programming language and the JRE.

There’s a general technique to improving performance that involves something I call effect rotation.

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Making Scala Faster: Three Expert Tips for Busy Dev Teams [Video and Slides]

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How To Make Your Scala Applications Compile Faster

With Scala, JVM developers get a host of benefits over other programming languages. From code conciseness (fewer LOC) and native scalability to support for functional programming paradigms and type safety, Scala is the language of choice for modern enterprises like Amazon, HPE, PayPal, and Walmart.

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MachineX: Association Rule Learning With KSAI

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In many of my previous articles, I have posted about Association Rule Learning, what it’s about, and how it is performed. In this article, we are going to use Association Rule Learning to actually see it in action, and for this purpose, we are going to use KSAI, a machine learning library purely written in Scala. So, let’s begin.

Adding KSAI to Your Project

You can add KSAI in your SBT project using the following import line:


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