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Who of us would not like to learn to fly faster and remember new information? The researchers attribute the strong cognitive abilities with a number of factors. They determine not only memory skills but also quality life — here is a successful career, active socialization and the ability to simply have fun in their free time. Not everyone is lucky to be born with a photographic memory, but that is no reason to despair. To do something in this situation. Someone learns of "Eugene Onegin", while others buy educational supplies and workbooks with specific exercises. Others — are increasingly paying attention to apps that promise its users with phenomenal results, if they are even ready to set aside 10-15 minutes to exercise. Describe on what basis these...

This is the first part of a series of articles on the basics microservice architectures. there you poznakomites with the concept of microservices and how to create microservices with Spring Boot and Spring Cloud. This guide will help you to learn the basics microservice architectures. We will also begin to consider the basic implementation of micro service with Spring Boot. We will create a couple of microservices and make them communicate with each other using the server name Eureka (Eureka Naming Server), and Ribbon for load balancing on the client side. Read more →

Abstract. The article is about a very simple script that generates the list of servers colleg ssh for Linux. Tested on Ubunta 18, use Goodle Cloud SDK, Python 2.7, Bash. After a sharp increase in the number of servers with which to work, understand, password vault, and the CMDB is not operational access, as in those days when you just remembered all the ip and details by heart. Maybe because the CMDB we still have not mastered. Nevertheless, to solve the problem of quick access via SSH to lots of servers as it is necessary. Then — from the point of view of a Linux terminal (run on Ubunta 18). Might work in other distros and probably even have a counterpart on Windows — was not looking. the Main requirements are: it is Easy to repeat. A few administrators...

Legacy technology Warning: ASP.NET MVC is already out of date. It is recommended to use ASP.NET Core. But if you're interested, then read. Decided to expand the previous article about ASP.NET MVC and MySQL. In it they talked about the work with MySQL ASP.NET MVC not using standard ORM Entity Framework (EF), and with direct access to the DBMS via ADO.NET. And was given the implementation of this access method. Although the method is obsolete and not recommended, but sometimes useful: for example, in high-load applications or when a developer is faced with a situation where the ORM can't generate a correctly working SQL query. And sometimes you can combine the application of both methods — and using an ORM and using ADO.NET. In the end, I thought, and decided...

SRE (Site Reliability Engineering) is an approach to ensuring the accessibility of web projects. It is considered the framework for DevOps and tells how to achieve success in the application of DevOps practices. In this article a translation of the Chapter 4 Service Level Objectives books Site Reliability Engineering of Google. This translation I was prepared independently and relied on their own experience understanding of monitoring processes. In telegram channel monitorim_it and last post on habré I published also a translation of 6 chapters of the same book on service level objectives. the Translation for the cut. Happy reading! Read more →

How it all began let's Start with the problem statement. This: one laptop. New laptop gaming. With an RGB backlight. Now about this laptop: Picture taken from lenovo.com There's more to the program to this laptop. Program just the lighting and controls. only One problem – the program under Windows, and want in your favorite Linux everything worked. And the lights that shone, and that the colors are beautiful flashed. But that's just how to do that without reverse engineering without writing their drivers? The simple answer came quickly – no way. Well, I went to write the driver. Read more →

Welcome. It so happened that for three consecutive years as a gift to certain people I'm making a game. In 2018, the year it was a platformer with puzzle elements, about which I wrote on Habre. In 2019-th — RTS network for two players, about which I wrote nothing. Finally, in 2020 — visual novel, which further will be discussed, based on severely limited time. In this article: the design and implementation engine for visual novels, game with a nonlinear storyline in 8 hours, takeaway game logic in the scripts in their own language. I Wonder? Then welcome under kat. Beware: there's a lot of text and ~3.5 MB of images Read more →

******************* Well, one of us read "the Beginning" Newton's? ***************** Take in hand the magazine “Science and life” №1 2020. On the cover is striking the question “Why Einstein is the greatest physicist?”. Really, why? Open article Eugene Berkowitz “the Tragedy of Einstein, or the happy Sisyphus”. It begins thus: “Who is the greatest physicist? Ask anyone, anyone will tell you: albert Einstein. No wonder the strict academician Lev Landau put it first in the hierarchy of physicists”. But, Mr. Berkowitz, because Landau has classified, I think, only existing at the time of physicists. At least the scale where Landau was not mentioned, Newton was not mentioned. With all the "modesty" Landau I can't imagine that somewhere there is a list compiled...

Good day, friends! In this small article I want to share with You information about some methods of the Console object that you can use along with the console.log(). the Full list of methods can be found here. From words to deeds. Yes, would be Chrome. Console.debug() and sonsole.info() Console.debug() and console.info() are used to output information messages to console, and, in fact, are analogues of the console.log(). One of the features of the console.debug() is that the output of this method the message is displayed only if the console is configured to display messages of debug level (for Chrome, check the tabs at Verbose Levels). Read more →

Hi. I Dmitry is the author and editor, I help IT companies to talk about themselves with the help of PR articles on a variety of resources, ranging from entertainment to large profile platforms (just about Habr, Yes). Someone like a literary Negro — roughly speaking, I come up with the techies, we long to communicate, I do text and it is on behalf of a company or a specialist. Or work as a team when volume is large, there are a few authors I edit for their articles. Recently there appeared an article about how to start to write about technology. According to my subjective opinion and cons, not very professional. But the text went digests copywriters, aviruses a little and it began to circulate in chatichah authors. This is bad, because beginners can begin...

Have You ever wondered how much information is lost without a trace? Because information is something for which there is Habr. I know that often happens to resources based on custom publications? The authors insert images, pictures and videos from other sites and after some time they are no longer available. It is for this when it was Habrastorage. Experience has shown that no one (except the editors and a few enthusiasts) does not load the image there yourself. Because at some point the administration Habra make it automatic — every image that is found in the publication, is automatically loaded into the warehouse and there will not be lost while there he Habr. Of course, there are exceptions, and something can go wrong, but this is not about them. the...

Conference DEFCON 27. Break open the police. Part 1 Raise your hand if you know where that can lead! OK, all this is interesting, but if we consider the example from 65 miles per hour, you can find a small problem. My device transmits this speed, as it works at a certain fixed frequency, but what if I drive past a school, where there is a speed limit? Besides, we never know what frequency police radar transmits a signal. However, friends, I have to say that we live in interesting times. We live in the future, when the global information is in our hands and we can do with it whatever you want. New car radar detectors, in particular the Valentine One and Escort 360, detect radar signals, located approximately 2-3 miles ahead of your car and using Bluetooth...

You do go on habré more than once a day? Not to read something useful, and just scroll through the home in search of "something to add to the list to read later"? Ever noticed that posts published at night, collecting fewer hits and rating than fluorescent? What can you say about the publications, vyshedshih in the middle of the weekend? When I published the previous post-analysis of dependence of indicators of publications of its length, Exosphere in the comments said that "there is some linkage out time and indicators publications (but the correlation is weak)". You know I could not pass up? so, is it important to publish on habré from 09:00 to 18:00? Or maybe only on Tuesday? What can you say about the day after payday? The holiday period? Well, you...

Sometimes flaws in the design are visible right away, and their sloppy execution slaps you in the face like a wet slice of ham. Others are more insidious, and problems lurk beneath the surface. Tail lights Cadillac XLR – an example of the latter group, and these problems cause a lot of headaches even existing owners of the XLR, which is costing them dearly. If you have forgotten, let me remind you that the Cadillac XLR was, in fact, the Corvette in the beautiful costume of a Cadillac and an improved interior. GM made these expensive cars from 2004 to 2009, they had a lot of innovation – for example, it was the first car from Cadillac with adaptive cruise control and seats that were able to cool and heat your bread. And yet he was the trendy led tail lights....

LOLSHTO? Please don't get me wrong. I am a professional Builder with 30 years experience. I can read and understand almost twenty languages, full base. I can write clear and expressive code for a good dozen of them. In the languages that I really love and use daily — my name appears on the honor roll StackOverflow (top 20 in the world: ruby , elixir ). I really love to write code, and I decline all offers "grow" up the job ladder, be it project management, CTO, or anything in that direction, despite the potential increase in income at times. — Abraham Willemsens (Metropolitan Museum of Art) But I am more convinced than ever that the industry is suffering from the terrible disease in its history. There are a number of reasons, and I'm going to Express my...