• (in)Finite War

      infitite war


      We have a problem. The problem with testing. The problem with testing React components, and it is quite fundamental. It’s about the difference between unit testing and integration testing. It’s about the difference between what we call unit testing and what we call integration testing, the size and the scope.


      It's not about testing itself, but about Component Architecture. About the difference between testing components, standalone libraries, and final applications.


      Everyone knows how to test simple components(they are simple), probably know how to test Applications(E2E). How to test Finite and Infinite things…

      But... no, nobody knows actually.
    • My experience of advertising and development of Android and iOS application



        Let me share an interesting experience in promotion of a mobile game.

        1. Introduction


        I am going to describe all the benefits and of course show the final results. The example will be the mobile game Quick Brain which is available for Android и iOS. Quick Brain Android was released the first that's why its possibilities differ considerably from iOS version.

        I have been always kept by the thoughts that everyone's talking about high returns in contrast with Android. I just couldn't resist such attractive prospects and started more active refinement of iOS version in order to feel less embarrassed about it.

        After Google play iOS has become an absolutely new field for the games for me. During my comparative experiment I've found out that iOS version can bring comparable earnings to Android with daily audience 3 to 10 times less depending on the country.
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      • [SAP] SAPUI5 for dummies: A complete step-by-step exercise

        • Tutorial

        Yesterday I’ve blogged about the content I’m creating for new developers that have arrived at our Techedge office in Lucca.


        Teaching is something I started to love, is the natural consequence of the fact that I love to learn and love to share my knowledge. And I think that it’s important that new students or young developers have some curated content to start with, maybe with also some tip&tricks that senior has learned during their journey.


        The idea behind this exercise is to cover every topic a SAPUI5 developer should know and understand.


        The exercise will be available on my GitHub project openui5-exercise.

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      • $10 million in investments and Wozniak's praise — creating an educational computer for children

          We interviewed Mark Pavluykovskiy — the creator of the Piper educational computer. We asked him about immigrating from Ukraine to the US, how he almost died in Africa, graduated from Princeton, dropped out of a doctorate in Oxford and created a product that deserved a praise from Satia Nadella and Steve Wozniak.



          In mid-October the Sistema_VC venture capital fund hosted a conference called Machine Teaching, where creators of various educational startups assembled to talk about technical advancements.

          The special guest was Mark Pavluykosvkiy, the creator of Piper. His company created an educational computer — a children’s toy that, using wires, circuit boards and Minecraft teaches programming and engineering to children. A couple of years ago Mark completed a successful Kickstarter campaign, got a couple of Silicon Valley investors on board and raised around $11 million dollars in investments. Now he’s a member of Forbes’ “30 under 30” list, while his project is used by Satia Nadella and Steve Wozniak, among others.

          Mark himself is a former Princeton and Oxford student. He was born in Ukraine, but moved to the US with his mother when he was a child. In various interviews Mark claimed that he doesn’t consider himself a genius, but simply someone who got very lucky. A lot of other people aren’t so lucky, however, and he considers it unfair. Driven by this notion, during his junior year he flew to Africa, where he almost died.
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        • System in Package, or What's Under Chip Package Cover?

            Transistor feature size is decreasing despite constant rumors about the death of Moore’s law and the fact that industry is really close to physical limits of miniaturisation (or even went through them with some clever technology tricks). Moore’s law, however, created user’s appetite for innovation, which is hard to handle for the industry. That’s why modern microelectronic products aren’t just feature size scaled, but also employ a number of other features, often even more complicated than chip scaling.


            Disclaimer: This article is a slightly updated translation of my own piece published on this very site here. If you're Russian-speaking, you may want to check the original. If you're English-speaking, it's worth noting that English is not my native language, so I'll be very grateful for the feedback if you find something weird in the text.
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          • Currying and partial application in C++14

            • Translation

            In this article I'm going to tell you about one of the currying options and partial application of the functions in C++ which is my personal favourite. I'm also going to show my own pilot implementation of this thing and explain the point of currying without complex mathematical formula, making it really simple for you. We'll also see what's under the hood of kari.hpp library which we'll be using for currying functions. Anyway, there are lots of fascinating stuff inside, so welcome!

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          • Gotta Go Fast: Building for Speed in iOS. Part 1



              There are a lot of tips and tricks that allow iOS developers to know how to make performance optimizations to get animations in applications run smoothly. After reading the article you will realize what 16.67 milliseconds for iOS developer means, and which tools are better to use to track down the code.

              The article is based on the keynote talk delivered by Luke Parham, currently an iOS engineer at Apple and an author of tutorials for iOS development on RayWenderlich.com, at the International Mobile Developers Conference MBLT DEV 2017.
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            • SAP: What do you need to start learning SAPUI5?

              • Tutorial

              image


              Introduction


              At the start of September 2018, some cool guys also joined our team, they are fresh from University and they are really hungry to learn how to design and develop amazing web apps with SAPUI5.


              That’s why I’ve started to collects internally on the web some links in order to create “The perfect journey to become a SAPUI5 Ninja Developer”.


              I’ve also started to write down some exercise (from easy to hard) in order to test what they’ve learned but I will share those in a second blog post as soon I’ve finished them.


              Presentation


              Hi everyone,
              I'm Emanuele Ricci, a full-stack developer based in Lucca (a beautiful little city in Tuscany, Italy).


              Since the last three years, I work full-time for Techedge Group, a big worldwide consultant company that is a partner with SAP. I usually work in projects related with SAPUI5, SCP, HANA and in my free time, I love to create content around the technology I use at work and in my personal projects outside SAP. Lately, I'm a little bit experimenting with Android after the release of SAP Fiori SDK for Android/iOS.

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            • A bot for Starcraft in Rust, C or any other language

              • Translation

              StarCraft: Brood War. This game means so much to me! And to many of you, I guess. So much, that I wonder if I should even give a link to its page on Wikipedia or not.


              Once Halt sent me PM and offered to learn Rust. Like any ordinary people, we decided to start with hello world writing a dynamic library for Windows that could be loaded into StarCraft's address space and manage units.


              The following article will describe the process of finding solutions and using technologies and techniques that will allow you to learn new things about Rust and its ecosystem. You may also be inspired to implement a bot using your favorite language, whether it be C, C++, Ruby, Python, etc.

              Ready to roll out!
            • Configure the development environment for learning HTML, CSS, PHP in Windows

              • Tutorial

              Configure the development environment for learning HTML, CSS, PHP in Windows.


              (article is published on linkedin.com (Alexander Panov) )


              web - developer PHPStorm and Vagrant


              Beginning programmers always ask the question, where to start learning about creating websites? Search on the Internet gives a lot of various information, but unfortunately only more confuses novice developers. Having more than 5 years of teaching experience, I have seen many times how students, making breaks in computer games and deciding to become web developers, tried to customize development environments. They began to sort out the programs for layout. They grabbed Sublime Text, Notepad ++, Visual Studio Code, NetBeans or PHPStorm. We tried to install on our local computer WAMP (stands for Windows, Apache, MySQL and PHP) platforms, such as Denver, Xampp, Open Server and many others. But since there is no systematic knowledge in the head of a novice developer, there is no experience of customization, it was rare for some of them to set up a convenient development environment, and whoever got it, understood that it became more difficult to play, since many additional programs, smoothness in the game.


              This article was born because of explaining for many years to each student how to do everything correctly and conveniently.


              Once again I want to say that we will set up a working environment in the Windows system to study the creation of sites in HTML, CSS and their links to PHP. We will call this computer working, so that beginning web developers get used to the idea that their computer is their source of income.


              Begin

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            • PVS-Studio 7.00

                PVS-Studio C#\Java\C++Today is an important day — after 28 releases of the sixth version we present our PVS-Studio 7.00, in which the key innovation is the support of the Java language. However, during 2018 we have acquired many other important changes related to C++, C#, infrastructure and support of coding standards. Therefore, we bring to your attention a note that sums up the major changes that have happened in PVS-Studio for the last time.
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              • Kalman Filter

                • Translation
                • Tutorial


                There are a lot of different articles on Kalman filter, but it is difficult to find the one which contains an explanation, where all filtering formulas come from. I think that without understanding of that this science becomes completely non understandable. In this article I will try to explain everything in a simple way.

                Kalman filter is very powerful tool for filtering of different kinds of data. The main idea behind this that one should use an information about the physical process. For example, if you are filtering data from a car’s speedometer then its inertia give you a right to treat a big speed deviation as a measuring error. Kalman filter is also interesting by the fact that in some way it is the best filter. We will discuss precisely what does it mean. In the end of the article I will show how it is possible to simplify the formulas.
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              • Automation VS Chaos

                  image

                  IT technologies evolution allowed to control huge data flows. Business has a lot of IT solutions: CRM, ERP, BPM, accounting systems or at least just Excel and Word. Companies are different too. Some of companies are composed of plenty branches. Let’s name such as “Pyramid”. Pyramids have data synchronization issue for pile of IT systems. Software vendors and versions differ for branches significantly. In addition management company continuously modify reporting requirements that causes frustration assaults in the branches. This is a story about the project I happened to encounter chaos that needed to be systematized and automated. Low budget and tight deadlines limited the use of most existing industrial solutions but opened up scope for creativity.
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                • How to Painlessly Unite Art with Java, JavaScript, and Graphs or The Story Behind Creating an Interactive Theatre Produc

                    Last year 2018, a theatre production series called Tale of the Century was launched in Estonia. Throughout the year, 22 local theatres presented their interpretations of the past hundred years of Estonian history to the audiences. In the draw, the Russian Theatre was assigned the topic of the future of Estonia.

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