You will learn and create an application-level library in COBOL. You will structure the package, implement automatic tests, deploy on GitHub and enable Continuous Integration workflow. Finally, you will publish the package in the COBOL package registry.
Unicorns break into RTS: analyzing the OpenRA source code
16 min
This article is about the check of the OpenRA project using the static PVS-Studio analyzer. What is OpenRA? It is an open source game engine designed to create real-time strategies. The article describes the analysis process, project features, and warnings that PVS-Studio has issued. And, of course, here we will discuss some features of the analyzer that made the project checking process more comfortable.
IIoT platform databases – How Mail.ru Cloud Solutions deals with petabytes of data coming from a multitude of devices
11 min
Hello, my name is Andrey Sergeyev and I work as a Head of IoT Solution Development at Mail.ru Cloud Solutions. We all know there is no such thing as a universal database. Especially when the task is to build an IoT platform that would be capable of processing millions of events from various sensors in near real-time.
Our product Mail.ru IoT Platform started as a Tarantool-based prototype. I’m going to tell you about our journey, the problems we faced and the solutions we found. I will also show you a current architecture for the modern Industrial Internet of Things platform. In this article we will look into:
- our requirements for the database, universal solutions, and the CAP theorem
- whether the database + application server in one approach is a silver bullet
- the evolution of the platform and the databases used in it
- the number of Tarantools we use and how we came to this
Как с помощью HUAWEI ML Kit самостоятельно создать апплет для фото на документы
5 min
Общая информация
В предыдущей статье мы рассказали о том, как создать камеру для улыбок с помощью HUAWEI ML Kit. В этот раз я собираюсь представить вам новую функцию HUAWEI ML Kit.
Вас когда-нибудь просили на учебе или работе принести фотографию определенного размера с цветным фоном для документов? В большинстве случаев у человека не окажется под рукой подходящей фотографии. Однажды в институте нам решили оформить персональные пропуска, но фотостудия оказалась закрыта. Тогда я сфотографировался на телефон, использовав простыню в качестве фона. И получил выговор от преподавателя. Но с помощью инструмента HUAWEI ML Kit вы сможете интегрировать SDK для сегментации изображений в ваше приложение и разработать апплет, чтобы создавать фото на документы самостоятельно и решить проблему отсутствия нужных фотографий.
Самое главное, что этот SDK абсолютно бесплатный и работает на всех телефонах на базе Android.
Разработка апплета для фото на документы самостоятельно
1. Подготовка
1.1 Добавьте репозиторий Maven Huawei в файл на уровне проекта build.gradle
Откройте файл build.gradle в корневом каталоге вашего проекта Android Studio.
Neural networks in reality
2 min
Recovery Mode
The mass of news and articles about artificial intelligence creates the illusion that we are living in a fantastic time. But when you start asking everyone what exactly is useful in real life from these high technologies, the answers come down to some Google features, mobile games and a story about Chinese videos. By the way, oh, these Chinese videos — for some reason, they are constantly shown by the central mass media when they demonstrate Moscow's intellectual technologies.
In words, it seems, all the «intellects» are installed already everywhere, the whole country has long been transferred to neural networks, but only in some kind of demonstration pictures, in diagrams, on fingers. There is a mental dissonance — why not take a video camera and shoot at least a fragment of how Russia's super mega technologies work?
As Nikita Sergeevich said, «science ceases to be self-indulgence when its fruits are applied in the national economy.» And today's artificial intelligence is familiar to us only from games. Many people really want to see something useful in reality. Therefore, we were not too lazy and recorded our video of the operation of neural networks from real objects.
In words, it seems, all the «intellects» are installed already everywhere, the whole country has long been transferred to neural networks, but only in some kind of demonstration pictures, in diagrams, on fingers. There is a mental dissonance — why not take a video camera and shoot at least a fragment of how Russia's super mega technologies work?
As Nikita Sergeevich said, «science ceases to be self-indulgence when its fruits are applied in the national economy.» And today's artificial intelligence is familiar to us only from games. Many people really want to see something useful in reality. Therefore, we were not too lazy and recorded our video of the operation of neural networks from real objects.
11 Years Of Node.JS: Timeline & Significant Contributions
4 min
Do you know Node.js has turned 11 on 27th May 2020? Can’t believe we have stepped into a new decade of this technology? Okay! Let me tell you the truth and story behind it with this article.
JavaScript has come a long way with its constant bombardment of open-source frameworks. We all have embraced its journey, and Node.js is one of its prevalent and predominant innovations that knocked this tech arena on May 27th, 2009. So, technically and mathematically, both Node.js is 11 years old now.
Top 5 Android App Development Companies To Seek in 2020
6 min
The mobile app industry is at its peak of success and keeps evolving with the latest mobile app development technologies in future. It doesn’t matter which business you run but without an app, you cannot grow in this competitive environment.
An Android app is enough to make you achieve all your business goals. In 2019, there were around 2.13 billion apps downloaded from Google Play Store which clearly indicates its huge demand in near future and so the demand for Android app development companies in 2020.
According to AppBrain stats, there are over 2,963,573 Android apps on Google Play at present and approx. 1,365,868 no. of apps with rating.
With so many app development companies around us make it difficult to select the reliable Android app development company especially when it comes to business owners. Finding a cost-effective company which can give satisfactory results is not much difficult as it seems to you.
All you need to pick a sorted collection of the best Android app development companies where you can find the one which suits your business. Here, I have sorted a list of top 5 Android App Development Companies that you can partner with in 2020.
Sberbank Online iOS testing
6 min
Tutorial
Theory of testing is usually differs from practice. Today we want to talk about our practical experience in testing application's code which is used by millions of iOS users and about the difficult path that our team finished in order to achieve stable code.
Let’s imagine: the developers successfully convinced themselves and the business of the need to cover the code with tests. Over time, in the project were created more than a dozen thousand unit- and more than a thousand UI-tests. Such a large test base araised several problems, and we successfully found the solution for them.
Let’s imagine: the developers successfully convinced themselves and the business of the need to cover the code with tests. Over time, in the project were created more than a dozen thousand unit- and more than a thousand UI-tests. Such a large test base araised several problems, and we successfully found the solution for them.
Static Analysis: From Getting Started to Integration
9 min
Sometimes, tired of endless code review and debugging, you start wondering if there are ways to make your life easier. After some googling or merely by accident, you stumble upon the phrase, "static analysis". Let's find out what it is and how it can be used in your project.
The Project «Fabula»: How to find the desired video-fragment or person in a pile of video files?
2 min
If a person is far over 20, then he has already accumulated a huge film library of his life, as well as videos from friends, relatives, and from his place of work… It is no longer possible to find someone or something specific there. Recently, I was preparing a video compilation for my daughter's anniversary – I spent a week. The media is all the more overloaded with video archives. And every day, millions of terabytes of video content appear in the world. And this is in the era of BIG DATA.
Under the Hood of PVS-Studio for Java: How We Develop Diagnostics
8 min
To keep it interesting, this time I'd like to tell about our approach to developing and polishing diagnostic rules for PVS-Studio Java. You will learn how we keep existing warnings consistent across releases and why the new ones aren't too weird. I'll also share a bit of inside information on what plans we, the Java team, have for the future, and show you a few interesting (and a few plain) bugs we found using the diagnostics from the upcoming release.
Static Analysis: baseline VS diff
6 min
Translation
If you use static analyzers, you will have, sooner or later, to address the task of making their integration into existing projects easier, where fixing all warnings on legacy code is unfeasible.
The purpose of this article is not to help with integration but rather to elaborate on the technicalities of the process: the exact implementations of warning suppression mechanisms and pros and cons of each approach.
The purpose of this article is not to help with integration but rather to elaborate on the technicalities of the process: the exact implementations of warning suppression mechanisms and pros and cons of each approach.
Spring transaction management. Isolation and propagation
3 min
Introduction
In my opinion transaction management is a really important topic for each backend developer. In general, people don’t pay attention to it while using Spring framework.
But I think, it is important to know how to use transactions properly. Because sometimes can happen that there was an exception thrown inside your method, but transaction was not rolled back and it is not clear why? Or some other “strange” cases.
Lossless ElasticSearch data migration
5 min
Translation
Academic data warehouse design recommends keeping everything in a normalized form, with links between. Then the roll forward of changes in relational math will provide a reliable repository with transaction support. Atomicity, Consistency, Isolation, Durability — that's all. In other words, the storage is explicitly built to safely update the data. But it is not optimal for searching, especially with a broad gesture on the tables and fields. We need indices, a lot of indices! Volumes expand, recording slows down. SQL LIKE can not be indexed, and JOIN GROUP BY sends us to meditate in the query planner.
Boot Ubuntu via http/ftp server with pxe(diskless boot)
5 min
Tutorial
Intro
PXE is a great solution for booting a diskless computer (or a computer without an OS installed). This method is often used for terminal stations and OS mass installation.
Stock ubuntu (16.04) in pxe-mode can mount rootfs only from NFS. But this is not a great idea: any difficulties with the network/NFS server and the user gets problems.
In my opinion, it's best to use other protocols, such as http/ftp. Once booting, you will have an independent system
EVVIS-QR1 USB Programmable TOTP hardware token
3 min
Today, we are presenting a new type of TOTP hardware tokens — USB Programmable token that displays the OTP value as a QR code and also can send the current OTP value over USB as a part of its HID emulation feature.What is EVVIS-QR1?
EVVIS-QR1 is a hardware device developed primarily for Electronic visit verification (EVV) information systems (hence the name). It is a standards-based TOTP hardware token that can also be programmed over USB. The OTP generated is shown on the display both as regular digits as well as a QR image. Both features (OTP shown as QR code and HID keyboard emulation) are intended to make it possible to minimize typos when entering the OTP.
Here are the Most Popular Video Conference APIs To be Considered for your Mobile App
8 min
As the world rearranges into virtualized societal norms, the most convenient and simplified interaction for businesses or socially has come from video-based apps. Extensive use of these conferencing apps is trending Post COVID-19 pandemic.
Statista.com has tracked the high number of video conference app downloads from AppStore and GoogleStore for the following:
| Video conferencing App / Country | Hangouts Meet | Houseparty | Ms Teams | Zoom |
|---|---|---|---|---|
| USA | 30 | 8 | 11 | 4 |
| France | 23 | 30 | 16 | 2 |
| Germany | 15 | 26 | 11 | 17 |
| Spain | 64 | 2360 | 15 | 27 |
| Italy | 140 | 423 | 30 | 55 |
The Testcontainers’ MongoDB Module and Spring Data MongoDB Reactive in Action
19 min
Tutorial
1. Introduction
How can I easily test my MongoDB multi-document transaction code without setting up MongoDB on my device? One might argue that they have to set it up first because in order to carry out such a transaction it needs a session which requires a replica set. Thankfully, there is no need to create a 3-node replica set and we can run these transactions only against a single database instance.
C2x: the future C standard
8 min
I strain to make the far-off echo yield
A cue to the events that may come in my day.
(‘Doctor Zhivago’, Boris Pasternak)
I’ll be honest: I don’t write in pure C that often anymore and I haven’t been following the language’s development for a long time. However, two unexpected things happened recently: С won back the title of the most popular programming language according to TIOBE, and the first truly interesting book in years on this language was published. So, I decided to spend a few evenings studying material on C2x, the future version of C.
Here I will share with you what I consider to be its most interesting new features.
Modern COBOL: Microservice Tutorial
6 min
Tutorial
You will learn and implement a microservice in COBOL without Mainframe. You will structure the project, manage dependencies, implement automatic tests and build virtualized execution environment. Finally, you will publish the microservice on GitHub under Continuous Integration workflow.
Hubs
Authors' contribution
alizar 91659.8marks 24166.6ru_vds 19931.3alexzfort 14179.0XaocCPS 10986.2pronskiy 10649.4m1rko 10382.0ptsecurity 9564.7Andrey2008 9539.2Jeditobe 9387.6