News from Habr

How to add a card to Apple Wallet in React Native?

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dev_family @ Habr 1 place · 11/15/2024 05:13 EDT

Mobile developers can use Apple Wallet and Google Wallet integrations for different types of apps.Once we already wrote our own library for Apple Wallet in React Native because we couldn't find anything ready to use. But now that Google Wallet is fully released, it's time to update it.Now, this library provides integration with both Apple Wallet on iOS and Google Wallet on Android. It allows you to add, remove, and... Read more ›

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[Translation] Affordable as a Bus, Comfortable as a Taxi: A Promising Type of Public Transport for Large and Medium-Sized Cities.Part2

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Sergey_Kovalenko @ Habr 1 place · 06/06/2023 03:47 EDT

(Jean-Claude Mézières) Translation provided by ChatGPT, link to the original article in Russian Link to Part 1: «Preliminary Analysis» (ру / eng ) Link to Part 2: «Experiments on a Torus» (ру / eng ) Link to Part 3: «Practically Significant Solutions» (ру / eng ) Link to «Summary» (ру / eng )Experiments on the Torus This is the second part of a study dedicated to exploring new public transportation... Read more ›

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How did I increase the website performance score from 35 to 100 for both mobile and desktop?

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profleaddev @ Habr · 06/06/2023 02:52 EDT

Not long ago, I started my personal blog. Instead of opting for the traditional route of using the popular WordPress CMS for blogs, I decided to embrace new technologies. My choice landed on Next.js and a NoSQL-type database. Read more Read more ›

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Uniform gravity, can it exist?

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poo_factor @ Habr · 06/06/2023 02:47 EDT

Uniform gravity, can it exist?1. The motion of a free particle-like catV. Komen, I. TikhonenkovGood morning! You've woke up. Having prepared coffee and toasts of bread you are drifting from a kitchen to a table before a large wall TV. The left hand keeps a small plate with toasts and the right one controls coffee level within your beloved mug. The life is plotted out for ten seconds to come.... Read more ›

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[Translation] Affordable as a Bus, Comfortable as a Taxi: A Promising Type of Public Transport for Large and Medium-Sized Cities.Part1

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Sergey_Kovalenko @ Habr 1 place · 06/04/2023 12:00 EDT

(Jean-Claude Mézières) Translation provided by ChatGPT, link to the original articleLink to Part 2: «Experiments on a Torus»Link to Part 3: «Practically Significant Solutions»Link to «Summary»1. About this series of articles 1.1 Central result If I haven't made a critical mistake, I have discovered an astonishing passenger transportation scheme with unique characteristics. Imagine this scenario: you are in a big city and need to get from point A to point... Read more ›

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Pixel image rotation

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Z1at @ Habr 1 place · 06/02/2023 14:13 EDT

Brief problem formulationThe program accepts as input the absolute path to the image in the bmp extension and the path where you save the result of the work. Then, it rotates the image by 90 degrees counterclockwise. Afterwards, the program saves the new image. The program is executed on C.  BMP file structure            BMP-file comprises the heading (it weighs 14 bytes) and the raster array (it weighs 40 bytes). I... Read more ›

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[Translation] How we built a Cyber Immune product using an open source library: stages, pitfalls, solutions

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d0nsergi0 @ Habr 1 place · 06/01/2023 13:36 EDT

Do you remember how, even before the pandemic set in, companies were striving to provide secure perimeter access for their telecommuters? Especially if super sensitive data was involved such as accounting information or corporate documents. The solutions were complex, bulky and expensive. Can you imagine just how critical it has become now?! My name is Sergey Yakovlev, and I'm the head of the Kaspersky Thin Client project based on our... Read more ›

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[Translation] PostgreSQL 16: Part 5 or CommitFest 2023-03

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kaze_no_saga @ Habr 2 place · 06/01/2023 08:27 EDT

The end of the March Commitfest concludes the acceptance of patches for PostgreSQL 16. Let’s take a look at some exciting new updates it introduced.I hope that this review together with the previous articles in the series (2022-07, 2022-09, 2022-11, 2023-01) will give you a coherent idea of the new features of PostgreSQL 16. Read more Read more ›

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[Translation] «Promising Public Transportation for Large and Medium-Sized Cities» — the main idea in a brief summary

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Sergey_Kovalenko @ Habr 1 place · 06/01/2023 05:20 EDT

(источник) Translated into English with the help of ChatGPT, link to the original article. I recently published a series of articles titled 'As Cheap as a Bus, as Convenient as a Taxi...':1) «Preliminary Analysis»2) «Experiments on the Torus»3) «Practically Significant Solutions» (these articles are currently available only in Russian) dedicated to making public transportation in large cities completely seamless, without the need for transfers. In the last article of the... Read more ›

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Blinking into Morse code

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Z1at @ Habr 2 place · 05/31/2023 07:45 EDT

Explaining main algorithm.For a while I’ve been thinking of writing a scientific article. I wanted it to have certain utility. Morse code is binary: it takes only two values – either dot (short) or hyphen (long). I figured out that short (s) can stand for two-eye blinking whilst long (l) can indicate left-eye blinking. Another question emerged: how to understand when does one-symbol recording stop? Empty space between two symbols... Read more ›

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Multithreaded FTP client

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nikit34 @ Habr 2 place · 05/30/2023 21:49 EDT

Task: To provide automation for transfer of large number of files.Source - computer with autotest codebase. Receiver - gateway for industrial data processing. Test receiver - second PC with installed vsftpd service. Read more Read more ›

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Apply «capital letters jam» for generic type parameters

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urusoff @ Habr 3 place · 05/30/2023 10:11 EDT

There are such types in Java - called "Generics". And the point here is that there is a convention for naming generic type parameters WITH ONE CAPITAL LETTER.But we have found much more readable approach! Capital letters jam technique? Read more ›

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Feature Engineering: Techniques and Best Practices for Data Scientists

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AmiraB2 @ Habr 3 place · 05/30/2023 03:53 EDT

The most important stage in the data science process is feature engineering, which entails turning raw data into useful features that might enhance the performance of machine learning models. It calls for creativity, data-driven thinking, and domain expertise. Data scientists can improve the prediction capability of their models and find hidden patterns in the data by choosing, combining, and inventing relevant features. Handling missing data, scaling features, encoding categorical variables,... Read more ›

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Errors in designing online stores: TOP-10 for the homepage and catalog

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princessafia @ Habr 1 place · 05/28/2023 17:28 EDT

Hello, in this article, I discuss the top mistakes that can cause businesses to lose money based on around 50 audits of online stores. I provide examples and explain using research.In my work, I focus on CX, customer experience. I make the design not only visually appealing but also functional. It's important for the shopper to easily navigate the store, find the desired products, and not get distracted from making... Read more ›

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On Computational Nature of Reality

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VladGoryachev @ Habr 2 place · 05/28/2023 10:53 EDT

I explain experimental results of Bell’s Theorem by superdeterminism. I follow with insights into how such a universe may arise and be compatible with the subjective experience of free will. Read more Read more ›

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[Translation] Technical Game Design. Configs, balance and content in the example of PC strategy

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Kallist @ Habr 2 place · 05/27/2023 12:12 EDT

One of the common tasks that both beginners and experienced game designers face is describing a large amount of content to pass its parameters to the engine. This is not an easy task, given that it is very difficult to find materials on the technical aspects of game design. Well, let’s figure out how to transfer data to the engine. Read more Read more ›

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Push notifications: why we need them, how to do them. How to write push notifications that won't piss you off

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princessafia @ Habr 1 place · 05/26/2023 12:08 EDT

Push notifications are similar to promoters. You're peacefully walking down the street, and suddenly promoters approach you, urging you to take their flyers. You take them, but you don't read them and throw them into the nearest trash can.The same goes for push notifications. You're reading an article, and suddenly a notification pops up with a promo code for free delivery of products. Then another one arrives, informing you about... Read more ›

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Monitoring CPU/RAM/disk metrics with OpenTelemetry and Uptrace

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vmihailenco @ Habr 1 place · 05/25/2023 04:43 EDT

OpenTeleletry Collector is an open source data collection pipeline that allows you to monitor CPU, RAM, disk, network metrics, and many more.Collector itself does not include built-in storage or analysis capabilities, but you can export the data to Uptrace and ClickHouse, using them as a replacement for Grafana and Prometheus.When compared to Prometheus, ClickHouse can offer small on-disk data size and better query performance when analyzing millions of timeseries. Read... Read more ›

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[Translation] Использование высокодинамичного языка для разработки

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prefrontalCortex @ Habr 2 place · 05/24/2023 10:10 EDT

Преимущества и навыки, полученные при использовании Common Lisp в разработке игрРазработка игр является увлекательной задачей. Игры требуют быстрого цикла разработки, высокой интерактивности и задают ограничения мягкого реального времени. Хотя в настоящее время небольшие игры разрабатываются на таких динамических языках, как Python или Lua, традиционно игровые движки пишутся на статических языках вроде C++ и C с каким-либо скриптовым языком поверх для обработки геймплейных механик. Common Lisp предоставляет Read more ›

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Concept Art in Game Design: An Introduction to its Significance and Fundamental Principles

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princessafia @ Habr 3 place · 05/24/2023 07:21 EDT

Let's talk about concept art, one of the main pillars in the digital art world. Concept art is the foundational and fundamental stage of any media industry project, where bold design choices are made and the best one is selected, shaping the overall style of the product. "Concept" refers to abstract ideas and fresh designs, while "art" entails the intentional use of imagination to create objects for immediate contemplation, which... Read more ›

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Stand on two legs with code review

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urusoff @ Habr 1 place · 05/18/2023 11:27 EDT

The problemUnfortunately, when fulfilling their planned business goals, the departments of the organisation rarely take into account such a metric as solution code quality. And usually developers has no time for normal code review process. Code review process experience? Read more ›

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