News from Habr

Введение в метрики для PHP разработчика

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setnemo @ Habr 1 place · 02/27/2021 19:11 EDT

Если вы php разработчик и слышали про метрики, но не знаете с чего начать - эта статья для вас. Я подготовил тестовый реопзиторий, который поможет вам начать работать с метрики, строить графики, настраивать оповещения. Если все это у вас отликается, то добро пожаловать под кат. Читать далее Read more ›

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[Translation] HDB++ TANGO Archiving System

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Jessy_James @ Habr · 02/27/2021 12:02 EDT

What is HDB++?This is a TANGO archiving system, allows you to save data received from devices in the TANGO system.Working with Linux will be described here (TangoBox 9.3 on base Ubuntu 18.04), this is a ready-made system where everything is configured.What is the article about?System architecture. How to set up archiving. It took me ~ 2 weeks to understand the architecture and write my own scripts for python for this... Read more ›

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Run MongoDB Atlas locally for testing

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silaev_ka @ Habr 2 place · 02/26/2021 12:18 EDT

What happens to your MongoDB replica set when it comes to failures like network partitioning, restarting, reconfiguration of the existing topology, etc.? This question is especially important these days because of the popularity gained by the multi-cloud model where chances of these scenarios are quite realistic.However, is there a solution, preferably a free one, for testing such cases that would obviate the need of writing manual scripts and poring over... Read more ›

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Chatbox on Top of SIEM Solution

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chdan @ Habr 1 place · 02/25/2021 11:35 EDT

One of the most time-consuming steps while implementing a SIEM solution is writing and tuning "Playbook" – a set of reaction procedures SOC Team has to follow in case of alert triggering.So during one of our projects we stoped for a moment and thought: "How can we optimize (ideally automate) the Playbook?" Read more Read more ›

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Что вам нужно знать, если вы поменяете nginx на envoy: впечатления спустя два года

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featured @ Habr 2 place · 02/25/2021 06:11 EDT

Мы используем envoy как front edge proxy, который перенаправляет входящий трафик в несколько кластеров kubernetes (для новых сервисов) и в бэкенды legacy-архитектуры исторического наследия. Т.е. там сочетаются функции как обычного балансировщика и ssl termination point, так и api gateway. До envoy у нас там был nginx, как и у многих. Классный софт, мне нравится. Вся история с envoy началась в тот момент, когда начались микросервисы в большом количестве и даже... Read more ›

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Free Heroes of Might and Magic II: Open-Source Project that You Want to Be Part of

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Stolyarrr @ Habr 1 place · 02/24/2021 02:31 EDT

Recently we found out that the new version of the fheroes2 project was released. In our company there are many fans of Heroes of Might and Magic game series. So, we couldn't pass it up and checked the project by PVS-Studio. Читать далее Read more ›

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Creating and using your own deb repository (not mirroring)

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Boozlachu @ Habr 2 place · 02/24/2021 01:28 EDT

Tested on the following configuration:Server: ubuntu 20.04Clients: ubuntu 16.04, 18.04, 20.04It doesn’t require a lot of software to create it. Читать далее Read more ›

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.Net Development Platform Features

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programmersio @ Habr 3 place · 02/23/2021 11:03 EDT

Here are top 8 things you should know about .Net Development before you hire expert .Net developers for your project.Novices and entrepreneurs should realize that from a straightforward design, .Net system has advanced to a total environment offering help and improvement procedures for a wide range of users novices and entrepreneurs should realize that from a straightforward design, .Net system has advanced to a total environment offering help and improvement... Read more ›

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[Translation] Improving Ansible

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tnt4brain @ Habr 1 place · 02/22/2021 08:42 EDT

Let's once again improve Ansible. Well, this won't work without getting into sources. Take the action Read more ›

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Algorithms in Go: Matrix Spiral

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aydu @ Habr 2 place · 02/22/2021 03:58 EDT

Most solutions to algorithmic problems can be grouped into a rather small number of patterns. When we start to solve some problem, we need to think about how we would classify them. For example, can we apply fast and slowalgorithmic pattern or do we need to use cyclic sortpattern? Some of the problems have several solutions with different patterns. In this article of series Algorithms in Go we consider an... Read more ›

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Top 7 Technology Trends to Look out for in 2021

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serenaryder @ Habr 1 place · 02/21/2021 08:53 EDT

Technology is as adaptable and compatible as mankind; it finds its way through problems and situations. 2020 was one such package of uncertain events that forced businesses to adapt to digital transformation, even to an extent where many companies started to consider the remote work culture to be a beneficiary long-term model. Technological advancements like Hyper automation, AI Security, and Distributed cloud showed how any people-centric idea could rule the... Read more ›

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Хитрости работы с MeshLab: устранение ошибок в 3D моделях

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vovaekb90 @ Habr 2 place · 02/20/2021 11:40 EDT

Medium post (Filling holes in 3D mesh): https://vovaprivalov.medium.com/filling-holes-in-3d-mesh-using-meshlab-fea6849ab7a1Common problem with 3D meshes is incomplete surface with holes. That could be caused by imperfect reconstruction algorithm or low quality in depth sensor.We can easily repair surfaces of mesh in Meshlab program. Meshlab includes special filter for filling holes in 3D meshes.First open Meshlab. Then import mesh: File > Import Mesh.Here is an example of mesh with holes Читать далее Read more ›

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Единый UI-кит и синхронизация дизайна в Учи.ру. Часть 1

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aarefiev @ Habr 2 place · 02/20/2021 01:04 EDT

Пожалуй, все, кто имел дело с развитием семейства сайтов, сталкивались с проблемой поддержания единого вида компонентов. Когда счет сервисов идет на десятки и сотни, когда над ними работает все больше независимых друг от друга команд, рассинхрон в дизайне и коде появляется обязательно. Мы попробовали справиться с этим с помощью единой базы компонентов. В серии постов я расскажу о нашем опыте разработки UI-кита, удобного как для разработчиков, так и для дизайнеров,... Read more ›

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Overview of recent changes in rotor (v0.10… v0.14)

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basiliscos @ Habr 1 place · 02/20/2021 00:28 EDT

rotor is a non-intrusive event loop friendly C++ actor micro framework with hierarchical supervising, similar to its elder brothers like caf and sobjectizer. There is a bulk of important changes since the last release announcement v0.09 Read more → Read more ›

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OOX 2.0: Out of Order eXecution made easy

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anton-malakhov @ Habr 1 place · 02/18/2021 11:31 EDT

As Intel Threading Building Blocks (TBB) is being refreshed using new C++ standard, deprecating tbb::task interface, the need for high-level tasking interface becomes more obvious. In this article, I’m proposing yet another way of defining what a high-level parallel task programming model can look like in modern C++. I created it in 2014 and it was my last contribution to TBB project as its core developer after 9 wonderful years... Read more ›

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Agile не только в офисе

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AlfaTeam @ Habr 2 place · 02/18/2021 10:00 EDT

Привет! В среду, 24 февраля, мы проведем онлайн-митап для интересующихся практиками Agile.Митап бесплатный, главное — зарегистрироваться заранее по ссылке. Всё действо займет пару часов (с 19.00 до 21.00).Если вдруг захотите посмотреть, но по каким-то причинам не получится, то мы пришлем вам запись на почту, указанную при регистрации.В программе 3 доклада от наших спикеров.Программа митапа Читать далее Read more ›

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Why PVS-Studio Uses Data Flow Analysis: Based on Gripping Error in Open Asset Import Library

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Andrey2008 @ Habr 3 place · 02/18/2021 09:35 EDT

An essential part of any modern static code analyzer is data flow analysis. However, from an outside perspective, the use of data flow analysis and its benefit is unclear. Some people still consider static analysis a tool searching for something in code according to a certain pattern. Thus, we occasionally write blog posts to show how this or that technology, used in the PVS-Studio analyzer, helps to identify another interesting... Read more ›

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Как сделать не стареющее тело? Общий принцип

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Rapasantra @ Habr · 02/18/2021 08:45 EDT

Что есть общего между человеком и снежинкой? И человек и снежинка могут расти и, причём основной – базовый принцип создания тела снежинки и тела человека одинаковый. В математике и в информатике этот принцип известен под названием клеточные автоматы. Принцип заключается в том, что есть некоторые простые правила добавления или уничтожения элементов конструкции тела. Мы можем задать эти простые правила, задать эти начальные условия развития системы и далее остаётся только наблюдать,... Read more ›

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Date Processing Attracts Bugs or 77 Defects in Qt 6

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Andrey2008 @ Habr 1 place · 02/16/2021 13:02 EDT

The recent Qt 6 release compelled us to recheck the framework with PVS-Studio. In this article, we reviewed various interesting errors we found, for example, those related to processing dates. The errors we discovered prove that developers can greatly benefit from regularly checking their projects with tools like PVS-Studio. Read more → Read more ›

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Third Order Low-pass Filter with One Op Amp

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quaer @ Habr 2 place · 02/16/2021 08:22 EDT

Common approach to build a third order low-pass filter is to use two circuit stages and two Op Amps. Making good One Op Amp design is not always easy, but it is possible.Read more → Read more ›

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