News from Habr

React Native Splash Screen — support for different themes

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dev_family @ Habr 1 place · 09/20/2024 05:27 EDT

Hi all! The dev.family team is in touch. In this article, we are sharing a short guide on how to install Splash Screen in a cross-platform app written in React Native with support for multiple themes.Splash screen is the first screen that users see before loading into the main application. This screen is perhaps the best way to make the name of your app, and in general, its entire name,... Read more ›

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[Translation] Text-based CAPTCHA in 2022

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andrey78910 @ Habr 2 place · 06/09/2022 05:10 EDT

The first text-based CAPTCHA ( we’ll call it just CAPTCHA for the sake of brevity ) was used in 1997 by AltaVista search engine. It prevented bots from adding Uniform Resource Locator (URLs) to their web search engine. Back then it was a decent defense measure. However the progress can't be stopped, and this defense was bypassed using OCR available at those times (for example FineReader).CAPTCHA became more complex, noise... Read more ›

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[Translation] Algebra of text without formulas

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SergeyBPshenichnikov @ Habr 2 place · 06/08/2022 11:38 EDT

The article is an abstract of my book [1] based on previously presented publications [2], [3], [4], [5] Read more Read more ›

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[Translation] Collective meaning recognition

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SergeyBPshenichnikov @ Habr 2 place · 06/07/2022 15:41 EDT

The published material is in the Appendix of my book [1]Modern civilization finds itself at a crossroads in which to choose the meaning of life. Because of the development of technology, the majority of the world's population may be "superfluous" - not in demand in the production of values. There is another option, where each person is a supreme value, an absolute individual and can be indispensably useful in the... Read more ›

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Django ModelAdmins autoregister

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danilovmy @ Habr 2 place · 06/06/2022 23:59 EDT

Some time ago I discovered that Django has the ability to auto-register ModelAdmins. Since this is not common knowledge and carries a number of benefits, I decided to write an article about it to bring it to the attention of the Django community. Read about Django ModelAdmin autoregistry Read more ›

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Wi-Fi and CWMP (TR-069) / USP (TR-369) protocols: frequecy optimization attempt

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ritchie_kyoto @ Habr 1 place · 06/02/2022 04:49 EDT

I guess, it's not a big deal to say that Wi-Fi (IEEE 802.11 standards) is the one of the most popular and most spread communication technology of the current day. Especially indoors. The growing number of Wi-Fi devices still remains that leads to the overcrowded spectrums: both 2.4 GHz and 5 GHz.This fact means increasing of demand for some optimization routines for utilization of resources. And therefore some RRM (Radio... Read more ›

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Fintech in practice: how Quadcode develops technology for trading and banking

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quadcode_team @ Habr 1 place · 05/31/2022 11:31 EDT

Hello, I am Aleksandr Ivanov, CTO at Quadcode. We came to the Medium to show the Fintech “kitchen”; we’ve been at it for 8 years, so we can already share our experience. In our blog we will talk about architectures, technologies, tools and life hacks. Read more Read more ›

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A Step-by-Step Guide To Integrate Video Features Within Apps Using WebRTCs

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parthiba @ Habr 1 place · 05/30/2022 06:18 EDT

WebRTC integrations have emerged as a game-changer in the Video Calling Technology over the years. The protocol has redefined the way real-time video communications take Developers can integrate WebRTCs commonly available as JavaScript APIs to add audio and video solutions to their apps. place. Developers can integrate WebRTCs commonly available as JavaScript APIs to add audio and video solutions to their apps. This tutorial will take you through the steps... Read more ›

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Utilitarian blockchain. 1. Assets

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gmtd @ Habr 1 place · 05/29/2022 13:19 EDT

In the modern world, the term " **blockchain** " is steadily associated with cryptocurrencies, NFTs, mining, trading and financial pyramids. However, even among programmers and IT people there is not always a clear understanding of what it is and what it is for. This article attempts to look at this still relatively new element of the information and human space in practical and slightly philosophical aspects. > **Disclaimer**: The article... Read more ›

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[Translation] Queries in PostgreSQL. Index scan

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kaze_no_saga @ Habr 1 place · 05/24/2022 01:11 EDT

Queries in PostgreSQL. Index scanIn previous articles we discussed query execution stages and statistics. Last time, I started on data access methods, namely Sequential scan. Today we will cover Index Scan. Read more → Read more ›

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[Translation] 11 вещей, о которых вы должны помнить перед стартом нового проекта на Flutter

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dellini_dev @ Habr 2 place · 05/23/2022 14:30 EDT

Привет! Меня зовут Дарья, я Flutter-разработчик уровня Junior и это моя первая публикация на Хабре.Знаете, создавать новый проект всегда приятно — новая кодовая база, отсутствие legacy (пока что), null-safety, свежие версии ваших любимых пакетов и далее, далее, далее.Однако в начале проекта вы должны принять несколько важных решений: выбрать инструменты и пакеты для приложения, определить решение для управления состоянием, разработать план тестирования. В противном случае проект из красивой кареты превратит Read more ›

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Enhanced ActiveRecord preloading

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djezzzl @ Habr 1 place · 05/19/2022 14:48 EDT

In this guide, I'd like to share with you tips and tricks about ActiveRecord preloading and how you can enhance it to the next level. Read more Read more ›

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How to mimic Agile correctly?

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sshmakov @ Habr 2 place · 05/19/2022 00:25 EDT

A similar article should have appeared earlier, about ten or fifthteen years ago, when Agile was just starting to be implemented in companies. How many mistakes, problems, conflicts could be avoided if managers immediately approached the issue correctly ...But during this time, the experience of "implementing" Agile in different conditions, in different companies has accumulated, which should be generalized and widely disseminated. Read more Read more ›

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[recovery mode] Как мы перевели API-модули микросервисного проекта с Feign на OpenFeign

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Znatok_domRF @ Habr 1 place · 05/17/2022 10:37 EDT

Всем привет! Недавно мы решили задачу, как перейти на новую версию Spring + OpenFeign в мультимодульном проекте, в котором выделен API с навешенными аннотациями @FeignClient@RestController и @FeignClient. Я, Алексей Скакун, @hyragano ведущий разработчик ДОМ.РФ, поделюсь с вами этим кейсом. Читать далее Read more ›

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Two Factor Authentication — More Security, Less Effort

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Gehta @ Habr 2 place · 05/17/2022 07:48 EDT

Today we're talking multi-factor authentication, also known as two-factor authentication, and 2-step verification. It's got a few names but what is it?Well, essentially it's proving your identity in more than one way. The principle being that if one of these authentication factors is defeated, that's not enough to give access to your data. So your data should be secure if someone steals your password for example. It's not enough to... Read more ›

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Idiomatic Event Loop in C++

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tony-space @ Habr 1 place · 05/14/2022 14:06 EDT

Sometimes programming with mutexes gets too complicated and messy. Maybe you need to meet a new friend — the Event Loop pattern. Read more Read more ›

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[recovery mode] Information is changed by entropy

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Max_Yurchak @ Habr 1 place · 05/09/2022 13:59 EDT

According to the no-cloning theorem it is impossible to create an independent and identical copy of an arbitrary unknown quantum state. We cannot delete any quantum information as well. All changes in time of the state vector in quantum mechanics are described by the action of unitary operators. Accordingly, there must be an operator performing a deleting operation. The operator must be a zero matrix in order to nullify quantum... Read more ›

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Внедрение программы обучения Tableau в inDriver

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dima_vs @ Habr 1 place · 05/05/2022 06:52 EDT

Всем привет! Хочу поделиться новостями о том, как развивается BI-платформа в inDriver. Сегодня расскажу, как мы внедрили программу обучения Tableau в компании, чтобы развивать нашу self-service аналитику и децентрализовать процесс анализа данных. Перед тем, как начать рассказ про наш тернистый путь из проб, ошибок и успехов, хочу сделать небольшое лирическое отступление о том, из каких больших структурных блоков состоит наша BI-платформа. Их 3 — архитектура, self-service и репортинг. Подробнее о... Read more ›

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Lexical Analysis in 11l

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alextretyak @ Habr 1 place · 04/30/2022 17:00 EDT

This article discusses the lexical analyzer, which is an integral part of any compiler. The task of the lexical analyzer is to split the source code of the program into tokens. So for example the codeprint(1 + 2) will be tokenized asprint, (, 1, +, 2 and )Read more → Read more ›

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GraphQL without N+1 is easy. N1Loader is a must

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djezzzl @ Habr 2 place · 04/30/2022 08:58 EDT

N1Loader is designed to provide a simple way for avoiding N+1 issuesof any kind. Gladly, it's super easy to integrate with your GraphQLAPI. Without further delay, let's look at a simple but yet detailedexample. Read more Read more ›

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Does GPS transmit different data into LNAV and CNAV messages?

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Korogodin @ Habr 2 place · 04/29/2022 10:14 EDT

Different navigation message protocols are used for different navigation signal type. This is true even for a single system like NAVSTAR GPS. For example, L1C/A signals have a LNAV protocol, while L2C and L5 signals utilize a CNAV protocol. The newest L1C signal will use CNAV-2. The protocol defines a data distribution into frames, subframes, the subframes structure, transmission intervals, data resolution and so on. A navigation receiver use the... Read more ›

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