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KsyVolna @ Habr 2 place · 09/02/2021 00:20 EDT

Business trips with a cat on my lap or how to diversify remote work life

It has been a year since most of our life has become online. We at ISPsystem are used to working from the office and seeing all team members every day at arm's length. I adapted quickly to the new format. However, I will be honest; working remotely is not as easy as it may seem from the outside. Many fail to cope. The lack of live communication and the too... Read more

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Habr
IchNikola @ Habr 3 place · 09/01/2021 10:20 EDT

Technical support: what it's for and how to avoid burnout?

Not everyone enjoys working in support. Many people who work there experience burnout. So maybe companies shouldn't have any support at all? How do they benefit from it? Is there a way to prevent burnout while working in support? Let's try to find the answers. Read more Read more

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Habr
michael-filonenko @ Habr · 09/01/2021 09:15 EDT

In-Memory Showdown: Redis vs. Tarantool

In this article, I am going to look at Redis versus Tarantool. At a first glance, they are quite alike — in-memory, NoSQL, key value. But we are going to look deeper. My goal is to find meaningful similarities and differences, I am not going to claim that one is better than the other. There are three main parts to my story:We’ll find out what is an in-memory database, or... Read more

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Habr
fpn @ Habr 1 place · 08/31/2021 02:03 EDT

Load test of WebRTC recording on AWS

Do you remember how just a few years ago it was a disaster to lose a camera at the end of a vacation? All memorable pictures and videos then disappeared along with the lost device. Probably, this fact prompted the great minds to invent cloud storage, so that the safety of records no longer depends on the presence of the devices on which these records are made. Read more Read more

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Habr
Latyshenko @ Habr 2 place · 08/30/2021 08:00 EDT

Mirroring of the SAP ERP HCM Organizational Structure in the EC Company Structure

The blog post demonstrates flexibility of the Company Structure in Employee Central when replicating complex SAP ERP HCM Organizational Structures. Read more Read more

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Habr
ultral @ Habr 1 place · 08/27/2021 03:57 EDT

IaC Development Life Cycle

IaC Development Life CycleЭто расшифровка выступления на T-Meetup: DevOps Life Cycle.Осмелюсь предположить, что многие слышали про SDLC (Systems development life cycle). Но что, если все то же самое происходит с IaC? Read more → Read more

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Habr
fpn @ Habr 1 place · 08/27/2021 01:55 EDT

WebRTC face to face video chat. Load test

We continue to review variants of load tests. In this article we will go over the testing methodology and conduct a load test that we will use to try and determine the number of users that could watch and stream at the same time, meaning the users will simultaneously publish and view the streams. Read more Read more

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Habr
cerg2010cerg2010 @ Habr 2 place · 08/26/2021 09:17 EDT

Linux kernel turns 30: congratulations from PVS-Studio

On August 25th, 2021, the Linux kernel celebrated its 30th anniversary. Since then, it's changed a lot. We changed too. Nowadays, the Linux kernel is a huge project used by millions. We checked the kernel 5 years ago. So, we can't miss this event and want to look at the code of this epic project again. Read more Read more

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Habr
temujin @ Habr 2 place · 08/26/2021 05:00 EDT

Сетевые соединения X11

Есть две технологии в ИТ, которые казалось должны были исчезнуть на рубеже прошлого века, но их живучесть и удобство раз за разом отодвигает их уход со сцены. Речь идет об IPv4 и X11. Если первый из них практически во всех аспектах уступает IPv6, то преимущества Wayland, как технологии над X11 очевидны не всем. Wayland вовсе не универсален, как X Windows System, он намного более прост. Это дает ему ряд преимуществ... Read more

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Habr
ValeryKomarov @ Habr 1 place · 08/24/2021 08:49 EDT

XSS: attack, defense — and C# programming

XSS - or cross-site scripting - is one of the most common vulnerabilities in web applications. It has been on the OWASP Top 10 list (the list of the most critical security risks to web applications) for a while now. So let's figure out together how your browser can acquire and execute a script from a third-party website, and what this may lead to (spoiler: your cookies could get stolen,... Read more

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Habr
fpn @ Habr 2 place · 08/24/2021 02:15 EDT

Load testing for WebRTC mixer

This article is a continuation of our series of write-ups about load tests for our server. We have already discussed how to compile metrics and how to use them to choose the equipment, and we also provided an overview of various load testing methods. Today we shall look at how the server handles stream mixing. Read more Read more

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Habr
safchemist @ Habr 3 place · 08/23/2021 15:10 EDT

How to create a custom Scrollbar in Flutter using RenderShiftedBox

In my project, I was faced with the need to implement a scroll bar. The standard approaches didn't fully satisfy what designers wanted to see. Here is an example, it is slightly different in appearance from what I needed, but the essence is approximately the same: the scroll bar should be on the right side of the list and take into account the padding of the scroll bar, with the... Read more

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Habr
lany @ Habr 1 place · 08/22/2021 06:33 EDT

[Translation] One does not simply calculate the absolute value

It seems that the problem of calculating the absolute value of a number is completely trivial. If the number is negative, change the sign. Otherwise, just leave it as it is. In Java, it may look something like this:public static double abs(double value) { if (value < 0) { return -value; } return value; }It seems to be too easy even for a junior interview question. Are there any pitfalls... Read more

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Habr
CGDrone @ Habr 2 place · 08/22/2021 04:39 EDT

Water Simulation

So, I finally found a moment to write a bit about how we created the water for TReload. Our basic goal was to flood all of the levels with acid - a lot of acid, as the flooded area is massive :) Here’s one of the results which we got out of this process: Read more Read more

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Habr
yelnar @ Habr 3 place · 08/21/2021 10:03 EDT

How to setup TON validator

The The Open Network (TON) is a fast, secure and scalable blockchain and network project, capable of handling millions of transactions per second.It was originally introduced by Telegram and called Telegram Open Network. Unfortunately, in May 2020, they announced the closure of the project due to the US court decision. Right after that, three different organizations announced their intentions to continue work on the blockchain: TON Labs, NewTON (TON Foundation),... Read more

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Habr
mischmasch @ Habr 1 place · 08/21/2021 08:11 EDT

New features of the hybrid monitoring AIOps system Monq

In one of the previous articles, I’ve already written about the hybrid monitoring system from Monq. Almost two years have passed since then. During this time, Monq has significantly updated its functionality, a free version has appeared, and the licensing policy has been updated. If monitoring systems in your company start to get out of control, and their number rushes somewhere beyond the horizon, we suggest you take a look... Read more

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Habr
glebmachine @ Habr 2 place · 08/21/2021 04:00 EDT

Десятка лучших frontend-сообществ и каналов

Что может быть ценнее новых идей и нового опыта? Только возможность обсудить их вместе с людьми, которые в теме. Мы решили сделать для вас подборку самых интересных frontend-сообществ и полезных каналов на YouTube для разработчиков JavaScript и веб-дизайнеров. Read more Read more

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Habr
LuxoftRussia @ Habr 2 place · 08/20/2021 05:30 EDT

Quantitative‌ ‌Funds:‌ ‌What’s‌ ‌Interesting‌ ‌for‌ ‌Coders?

Hello, Habr! Not only traders but also mathematicians and programmers work with stock markets. Director of Engineering at Luxoft Artem Sosulnikov tells about data, which specialists of quantitative hedge funds work with, things they pay attention to, and conditions in such companies. Read more Read more

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Habr
vkhanieva @ Habr 2 place · 08/20/2021 04:51 EDT

Tutorial: how to port a project from Interop Word API to Open XML SDK

With the .NET5 release further development of some projects was questionable due to the complexity of porting. One can abandon small outdated libraries or find a replacement. But it's hard to throw away Microsoft.Office.Interop.Word.dll. Microsoft doesn't plan to add compatibility with .NET Core/5+, so in this article we focus on creating Word files with Open XML SDK. Read more Read more

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Habr
servosila @ Habr 1 place · 08/19/2021 02:14 EDT

Controlling Brushless Motors using a Linux computer or a PLC

In this video, we will look at how to connect brushless motor controllers to a Linux computer. Specifically, we will use a computer running Debian. The same steps would work for Ubuntu Linux and other Linux distributions derived from Debian. I've got a small sensorless brushless motor, and a bigger brushless motor with a built-in absolute encoder. Lets look at how to control those from my Debian Linux computer. Servosila... Read more

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