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The art of creating computer programs

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Clean Decomposition

Reading time4 min
Views1.8K
In this article, I want to consider an approach to splitting tasks into subtasks when using Clean Architecture.

The decomposition problem was encountered by the NullGravity mobile development team and below how we solved it and what get in the end.
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Augmented Reality: A perfect vehicle for 21st-century education

Reading time4 min
Views1.4K
With the advancements in technology, new ways are being explored and introduced to make teaching and learning more productive. This has taken the e-learning industry to new heights. It has been expected that the global e-learning market revenue will reach $300 billion by 2025.
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Zero, one, two, Freddy's coming for you

Reading time23 min
Views1.4K

Рисунок 1

This post continues the series of articles, which can well be called «horrors for developers». This time it will also touch upon a typical pattern of typos related to the usage of numbers 0, 1, 2. The language you're writing in doesn't really matter: it can be C, C++, C#, or Java. If you're using constants 0, 1, 2 or variables' names contain these numbers, most likely, Freddie will come to visit you at night. Go on, read and don't say we didn't warn you.
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Teaching folks to program 2019, a.k.a. in the search of an ideal program: Sequence

Reading time8 min
Views780

MUROM


Hi, my name is Michael Kapelko. I'm a professional software developer. I'm fond of developing games and teaching folks to program.


Preface


Autumn 2019 was the third time I participated as one of the teachers in the course to teach 10-15-year-old folks to program. The course took place from mid. September to mid. December. Each Saturday, we were studying from 10 AM to 12 PM. More details about the structure of each class and the game itself can be found in the 2018 article.


I have the following goals for conducting such courses:


  • create a convenient tool to allow the creation of simple games, the tool interested folks of 10 years old or older can master;
  • create a program to teach programming, the program interested folks of 10 years old or older can use themselves to create simple games.
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A new experiment: Call .NET gRPC services from the browser with gRPC-Web

Reading time3 min
Views3.5K
I’m excited to announce experimental support for gRPC-Web with .NET. gRPC-Web allows gRPC to be called from browser-based apps like JavaScript SPAs or Blazor WebAssembly apps.

gRPC-Web for .NET promises to bring many of gRPC’s great features to browser apps:

  • Strongly-typed code-generated clients
  • Compact Protobuf messages
  • Server streaming

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Tips and tricks from my Telegram-channel @pythonetc, January 2020

Reading time3 min
Views1.5K


It is a new selection of tips and tricks about Python and programming from my Telegram-channel @pythonetc.

Previous publications.


The order of except blocks matter: if exceptions can be caught by more than one block, the higher block applies. The following code doesn’t work as intended:
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Developing a symbolic-expression library with C#. Differentiation, simplification, equation solving and many more

Reading time15 min
Views8.3K
Hello!

[UPD from 12.06.2021: if you're looking for a symbolic algebra library, AngouriMath is actively developed. It's on Github and has a website. Discord for questions]

Why does programming a calculator seem to be a task, which every beginner undertakes? History might have the answer — computers were created for this exact purpose. Unlike the beginners, we will develop a smart calculator, which, although won't reach the complexity of SymPy, will be able to perform such algebraic operations as differentiation, simplification, and equations solving, will have built-in latex support, and have implemented features such as compilation to speed up the computations.

What are the articles about?
It will superficially tell about assembling an expression, parsing from a string, variable substitution, analytic derivative, equation numerical solving, and definite integration, rendering to LaTeX format, complex numbers, compiling functions, simplifying, expanding brackets, and blah blah blah.
For those who urgently need to clone something, repository link.

Let's do it!
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Top Web Development Companies To Seek In 2020 For Startups

Reading time5 min
Views2.5K
2020 is going to be a competitive year especially for business people. A large number of startups and small businesses are outsourcing their projects to the best web development agencies because of the skilled resources, outsourcing-friendly policies, high-quality work, affordable price and favorable time zones they have.

But selecting a good company can be a daunting task because we are surrounded by a pool of such companies today. Keeping this in my mind, I have shortlisted some of these companies to help you choose the best one which offers world-class web development services at affordable rates.

I have checked the diversified portfolio, their tech teams expertise, client’s feedback, reviews from sites like Goodfirms and Clutch before making this list. Moreover, I have taken references from some popular platforms viz. hackernoon, dev.to, yourstory, quora, medium and habr.

Lets' dive into my research work on this which would surely meet your business requirements.

1) Sysbee

image

Locale: Pula, Croatia
Budget array: $1,000+
Employees strength:200 -250
Clientele: Infobip, Atheneum, IKEA

Sysbee is a group of systems engineers and infrastructure architects dedicated to bringing modern DevOps culture to small and medium enterprises, with more than 15 years of experience in the field of web services and cloud hosting.

Provides top-notch web development services for a transmission and media company. The client needed IT experts to help with the organization and maintenance of their AWS infrastructure. As a result of this project, the media company saw an influx of new users and improved its market position.
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Is interactivity a major factor for an app’s success?

Reading time4 min
Views2.1K
Psychology plays an important role in the success of any marketing strategy. Attracting people to your app needs the right psychological approach. Human behaviors are highly crucial which are required to be considered while forming strategies.

Simplest thing in application affects their interactivity greatly. For example, even the number of notifications, as well as the time at which they will be sent, have a strong impact. According to a survey, 60% of respondents have a preference for what time of day they receive notifications.



This indicates that the way an app will communicate with users will have an immense effect on its success or failure. Do you know what are the factors that affect the interactivity of your app? Apart from that, how can you make an app interactive?
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How to Make Any Process Work With Transactional NTFS: My First Step to Writing a Sandbox for Windows

Reading time6 min
Views3.8K

TransactionMaster One of the modules in the Windows kernel provides support for combining a set of file operations into an entity known as a transaction. Just like in databases, these entities are isolated and atomic. You can make some changes to the file system that won't be visible outside until you commit them. Or, as an alternative, you can always rollback everything. In any case, you act upon the group of operations as a whole. Precisely what needed to preserve consistency while installing software or updating our systems, right? If something goes wrong — the installer or even the whole system crashes — the transaction rolls back automatically.


From the very first time I saw an article about this incredible mechanism, I always wondered how the world would look like from the inside. And you know what? I just discovered a truly marvelous approach to force any process to operate within a predefined transaction, which this margin is too narrow to contain. Furthermore, most of the time, it does not even require administrative privileges.


Let's then talk about Windows internals, try out a new tool, and answer one question: what does it have to do with sandboxes?

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Node.js VS Python: Which is Better?

Reading time8 min
Views38K
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If you are landing on this page you might be looking for several questions like:

– NodeJS or Python: which is the right choice for my next web app development project?

– Which programming language cost me less?

– Which programming language is suitable for which industry?

– Which programming language is suitable for small business or large scale enterprises?

– Which programming language is scalable, high performing and secure?

In this blog post, I’m going to answer all these questions AND MORE THAN THAT! So, continue reading this blog post:
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Glean Insights About 18 Best Java Frameworks To Use in 2020

Reading time10 min
Views4.3K

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Who doesn’t know about Java today? You can hear its mention in every nook and corner of the world. A significant majority of IT companies provide Java-based applications, while businesses are still driven to secure java applications due to robustness and stringent security facilities. However, Java frameworks are a matter of chaos for a variety of business owners that want their application to be standout.


The fact is that there is no dearth of java frameworks that makes application development simple and efficient. However, a number of people have a query regarding the selection of java framework on the basis of features, ease-of-use, cost, and many more. Businesses hire programmers in India, though they stay confused on which platform they want their app to be created.

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VVVVVV??? VVVVVV!!! :)

Reading time10 min
Views2.3K
If you're reading this text, you've either thought that something was wrong with the headline or you've seen the name of a familiar computer game. VVVVVV is an indie platformer game that has stolen the hearts of many players by its pleasant external simplicity and no less pleasant internal complexity. A few days ago, VVVVVV turned 10 years, and the author of the game — Terry Cavanagh — celebrated this holiday by publishing its source code. What mind-boggling things is it hiding? Read the answer in this article.

Рисунок 1
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Machine Learning in Static Analysis of Program Source Code

Reading time27 min
Views3K

Machine Learning in Static Analysis of Program Source Code

Machine learning has firmly entrenched in a variety of human fields, from speech recognition to medical diagnosing. The popularity of this approach is so great that people try to use it wherever they can. Some attempts to replace classical approaches with neural networks turn up unsuccessful. This time we'll consider machine learning in terms of creating effective static code analyzers for finding bugs and potential vulnerabilities.
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C++ Inliner Improvements: The Zipliner

Reading time3 min
Views887
Visual Studio 2019 versions 16.3 and 16.4 include improvements to the C++ inliner. Among these is the ability to inline some routines after they have been optimized, referred to as the «Zipliner.» Depending on your application, you may see some minor code quality improvements and/or major build-time (compiler throughput) improvements. 

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Tips and tricks from my Telegram-channel @pythonetc, December 2019

Reading time2 min
Views1.6K


It is a new selection of tips and tricks about Python and programming from my Telegram-channel @pythonetc.

Previous publications.


Different asyncio tasks obviously have different stacks. You can view at all of them at any moment using asyncio.all_tasks() to get all currently running tasks and task.get_stack() to get a stack for each task.
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Python in Visual Studio Code – January 2020 Release

Reading time3 min
Views2.5K
We are pleased to announce that the January 2020 release of the Python Extension for Visual Studio Code is now available. You can download the Python extension from the Marketplace, or install it directly from the extension gallery in Visual Studio Code. If you already have the Python extension installed, you can also get the latest update by restarting Visual Studio Code. You can learn more about  Python support in Visual Studio Code in the documentation.  

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