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mastodon - Link to source

How Thai authorities use online doxxing to suppress dissent

Link: citizenlab.ca/2025/04/how-thai…
Discussion: news.ycombinator.com/item?id=4…


JUICYJAM: How Thai Authorities Use Online Doxxing to Suppress Dissent - The Citizen Lab

A sustained, coordinated social media harassment and doxxing campaign – which we codenamed JUICYJAM – targeting the pro-democracy movement in Thailand has run uninterrupted, and unchallenged, since at least August 2020.
M. Scott (The Citizen Lab)

mastodon - Link to source

How encryption for Cinema Movies works

Link: serverless.industries/2024/05/…
Discussion: news.ycombinator.com/item?id=4…


How DCI Movie Delivery and Encryption works

The Cinema Industry is using its own standards for creating and distributing movies in a secure way. The DCI (Digital Cinema Initiatives) specification defines everything from file formats and encryption to the projection systems itself.
Serverless Industries

mastodon - Link to source

The Effect of Deactivating Facebook and Instagram on Users' Emotional State

Link: nber.org/papers/w33697
Discussion: news.ycombinator.com/item?id=4…


The Effect of Deactivating Facebook and Instagram on Users’ Emotional State

Founded in 1920, the NBER is a private, non-profit, non-partisan organization dedicated to conducting economic research and to disseminating research findings among academics, public policy makers, and business professionals.
NBER

mastodon - Link to source

First hormone-free male birth control pill enters human trials

Link: scitechdaily.com/99-effective-…
Discussion: news.ycombinator.com/item?id=4…


99% Effective: First Hormone-Free Male Birth Control Pill Enters Human Trials

YCT-529, a hormone-free male birth control pill, has shown high effectiveness in animals and is now in human trials, marking a breakthrough in male contraception.
Colin Collins (SciTechDaily)

mastodon - Link to source

U.S. citizen in Arizona detained by immigration officials for 10 days

Link: news.azpm.org/p/news-articles/…
Discussion: news.ycombinator.com/item?id=4…


U.S. citizen in Arizona detained by immigration officials for 10 days

Immigration officials in Tucson arrested the 19-year-old man from Albuquerque on April 8, saying he had entered the country illegally, before a judge dismissed his case on April 17.
news.azpm.org

mastodon - Link to source

Healthy soil is the hidden ingredient

Link: nature.com/articles/d41586-025…
Discussion: news.ycombinator.com/item?id=4…


Healthy soil is the hidden ingredient — here’s how I’m fighting to save it

Around 60% of the European Union’s soils are considered unhealthy, but geographer Jesús Rodrigo Comino is determined to help change that in his native Spain.
Forrester, Nikki

friendica - Link to source

Understanding React's Context API


React's component architecture is powerful, but passing data through multiple levels of components can quickly become cumbersome. This is where the Context API and the useContext hook come in - they provide an elegant solution to share data across your component tree without the hassle of prop drilling. In this blog post, we'll explore what Context API is, why you should use it, and how to implement it effectively in your React applications.

What is the React Context API?


The React Context API is a built-in feature that allows you to share data (state, functions, values) across your component tree without having to manually pass props through every level. It effectively solves the "prop drilling" problem, where you need to pass data through many layers of components that don't actually need the data themselves but simply pass it down to lower components.

Think of Context as a direct communication channel between a provider (a parent component that supplies the data) and consumers (any descendant components that need access to that data).

Why Use Context API?

1. Eliminates Prop Drilling


Passing props through multiple component layers creates unnecessary coupling and makes your code harder to maintain. Context lets you make data directly available to any component that needs it.

2. Simplifies State Management


Unlike external libraries such as Redux, the Context API is built into React and requires minimal setup. No need for actions, reducers, or managing a separate store—just create a context and a provider.

3. Improves Code Readability and Maintainability


By centralizing shared state and avoiding unnecessary prop chains, your component hierarchy becomes cleaner and more understandable, making your application easier to debug and maintain.

4. Lightweight and Built-In


Being part of React itself means you don't need additional dependencies, keeping your bundle size smaller compared to external state management solutions.

When to Use Context API


Context API is perfect for:

  • Global state (user authentication, theme preferences, language settings)
  • Sharing functions or handlers across deeply nested components
  • Managing global settings (e.g., dark/light mode)

However, it's not meant to replace all prop passing or state management. Use it for data that is truly global or needs to be accessed by many components at different levels.

Step-by-Step: Implementing Context API


Let's walk through the implementation of Context API with a simple example for managing user authentication:

1. Create a Context


First, we create a context object:

// UserContext.js
import React, { createContext } from 'react';

const UserContext = createContext();

export default UserContext;

2. Create a Provider Component


Next, we create a provider component that will manage the state:

// UserProvider.js
import React, { useState } from 'react';
import UserContext from './UserContext';

const UserProvider = ({ children }) => {
const [user, setUser] = useState(null);

// Login function to update user state
const login = (userData) => {
setUser(userData);
};

// Logout function to clear user state
const logout = () => {
setUser(null);
};

// Memoize the context value to prevent unnecessary re-renders
const value = React.useMemo(() => ({
user,
login,
logout
}), [user]);

return (
<UserContext.Provider value={value}>
{children}
</UserContext.Provider>
);
};

export default UserProvider;

3. Wrap Your App with the Provider


In your main file (e.g., index.js or App.js):

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import UserProvider from './context/UserProvider';

ReactDOM.render(
<UserProvider>
<App />
</UserProvider>,
document.getElementById('root')
);

4. Consume the Context Using useContext


Now, any component in your app can access the user data and functions:

// Profile.js
import React, { useContext } from 'react';
import UserContext from '../context/UserContext';

const Profile = () => {
const { user, logout } = useContext(UserContext);

return (
<div>
{user ? (
<>
<h2>Welcome, {user.name}</h2>
<button onClick={logout}>Logout</button>
</>
) : (
<p>Please log in to view your profile</p>
)}
</div>
);
};

export default Profile;

Best Practices for Efficient Context Updates


To ensure optimal performance when working with Context, follow these best practices:

1. Memoize Context Values


Always use useMemo to memoize your context values to prevent unnecessary re-renders:

const value = useMemo(() => ({ user, setUser }), [user]);

2. Split Contexts by Concern


Instead of a single mega-context, create multiple contexts for different concerns (e.g., separate contexts for theme, authentication, app settings):

// ThemeContext.js
const ThemeContext = createContext();

// UserContext.js
const UserContext = createContext();

// In your app:
<ThemeProvider>
<UserProvider>
<App />
</UserProvider>
</ThemeProvider>

3. Centralize Updates


Keep state update logic in the provider and pass update functions down through context:

const UserProvider = ({ children }) => {
const [user, setUser] = useState(null);

const updateUserProfile = (updates) => {
setUser(prev => ({ ...prev, ...updates }));
};

// Pass the update function in context
const value = useMemo(() => ({
user,
updateUserProfile
}), [user]);

return (
<UserContext.Provider value={value}>
{children}
</UserContext.Provider>
);
};

4. Use Local State for Temporary Data


Not all state needs to be in context. Keep temporary or component-specific state local:

const ProfileForm = () => {
const { user, updateUserProfile } = useContext(UserContext);
const [formData, setFormData] = useState(user);

const handleSubmit = (e) => {
e.preventDefault();
updateUserProfile(formData); // Only update context when form is submitted
};

// ...rest of component
};

Context API vs. Redux: When to Use Each

FeatureContext APIRedux
Setup ComplexitySimple, minimal boilerplateMore complex, requires actions/reducers
Built-inYesNo (external library)
PerformanceGood for small/medium appsBetter for large/complex apps
Code ReadabilityHighCan become verbose
DebuggingLimited toolsExcellent dev tools
Learning CurveLowModerate to high


The Context API is ideal for:

  • Small to medium-sized applications
  • Simpler global state needs
  • Projects where you want to minimize dependencies

Redux might be better for:

  • Large applications with complex state logic
  • Applications requiring time-travel debugging
  • Projects with extensive async operations


Conclusion


The Context API and useContext hook provide a powerful, built-in solution for state management in React applications. By eliminating prop drilling and centralizing your shared state, you can write cleaner, more maintainable code with minimal setup.

While it's not a replacement for all state management solutions, Context API is perfect for handling global data like user authentication, themes, and application settings. When used following the best practices outlined above, it can significantly simplify your React application's architecture while maintaining good performance.

Start implementing Context in your React applications today, and experience the benefits of streamlined state management!#webdev #javascript #react #frontend #software #coding #development #engineering #inclusive #community


Understanding React's Context API and useContext Hook

Understanding React's Context API React's component architecture is powerful, but passing...
Bholu Tiwari (DEV Community)

mastodon - Link to source

Gemma 3 QAT Models: Bringing AI to Consumer GPUs

Link: developers.googleblog.com/en/g…
Discussion: news.ycombinator.com/item?id=4…


Gemma 3 QAT Models: Bringing state-of-the-Art AI to consumer GPUs

The release of int4 quantized versions of Gemma 3 models, optimized with Quantization Aware Training (QAT) brings significantly reduced memory requirements, allowing users to run powerful models like Gemma 3 27B on consumer-grade GPUs such as the NVI…
Edouard YVINEC (developers.googleblog.com)

mastodon - Link to source

Everyone knows your location, Part 2: try it yourself and share the results

Link: timsh.org/everyone-knows-your-…
Discussion: news.ycombinator.com/item?id=4…


Everyone knows your location, Part 2: try it yourself and share the results

It's been more than 2 months now since my first post on the topic of location data sharing between various 3rd parties came out – in case you haven't seen it, you should definitely start from there: Everyone knows your locationHow I tracke…
tim (tim.sh)

friendica - Link to source

Zucker: Was die Wissenschaft (noch) nicht weiß | Terra-X-Kolumne


Wie ungesund ist Zucker wirklich? Ein Blick auf den Stand der Forschung, widersprüchliche Aussagen - und was das für unsere Ernährung bedeutet.

Widersprüchliche Aussagen über Zucker gehen auf ungeklärte Fragen in der Forschung zurück. Doch die Schlussfolgerungen für unseren Alltag sind eindeutiger, als es den Anschein hat.
Zucker: Was die Wissenschaft (noch) nicht weiß | Terra-X-Kolumne

N. E. Felibata 👽 reshared this.

mastodon - Link to source

An image of the Australian desert illuminates satellite pollution

Link: thisiscolossal.com/2025/04/a-s…
Discussion: news.ycombinator.com/item?id=4…


A Stunning Image of the Australian Desert Illuminates the Growing Problem of Satellite Pollution — Colossal

Stitching together 343 distinct photos, Joshua Rozells illuminates a growing problem of satellites polluting the night sky.
Grace Ebert (Colossal)

mastodon - Link to source

Show HN: I built an AI that turns GitHub codebases into easy tutorials

Link: github.com/The-Pocket/Tutorial…
Discussion: news.ycombinator.com/item?id=4…


GitHub - The-Pocket/Tutorial-Codebase-Knowledge: Turns Codebase into Easy Tutorial with AI

Turns Codebase into Easy Tutorial with AI. Contribute to The-Pocket/Tutorial-Codebase-Knowledge development by creating an account on GitHub.
GitHub

mastodon - Link to source

Silicon Valley crosswalk buttons apparently hacked to imitate Musk, Zuck voices

Link: paloaltoonline.com/technology/…
Discussion: news.ycombinator.com/item?id=4…


Silicon Valley crosswalk buttons apparently hacked to imitate Musk, Zuckerberg voices

Crosswalk buttons along the mid-Peninsula appear to have been hacked, so that when pressed, voices professing to be Mark Zuckerberg or Elon Musk begin speaking.
Zoe Morgan (Palo Alto Online)

mastodon - Link to source

Peru's ancient irrigation systems turned deserts into farms because of culture

Link: theconversation.com/perus-anci…
Discussion: news.ycombinator.com/item?id=4…


Peru’s ancient irrigation systems succeeded in turning deserts into farms because of the culture − without it, the systems failed

Ancient practices hold important lessons for farmers facing drying lands, but they were often more complex than modern societies realize. Glacier loss adds to the challenge today.
The Conversation

pleroma - Link to source

Source: libsoftiktok

DEMONIC. Sisters of Perpetual Indulgence, an "order of queer and trans nuns" are hosting a transgender Easter event at a public park in San Francisco this weekend which includes a "Hunky Jesus & Foxy Mary" drag contest and events for children.

They literally say that their show is inappropriate for children while still encouraging children to attend.

Make it make sense

Original tweet : xcancel.com/libsoftiktok/statu…

mastodon - Link to source

Restoring the Galaxian3 Theatre 6, 1992 six player arcade machine

Link: philwip.com/2025/04/14/galaxia…
Discussion: news.ycombinator.com/item?id=4…


Galaxian 3: Project Revival

Introduction During the late 1980s, Namco set out to create the world’s largest arcade game. The result was Galaxian3: Project Dragoon; a 28 player behemoth that debuted in April 1990 at the …
PhilWIP

mastodon - Link to source

Show HN: Undercutf1 – F1 Live Timing TUI with Driver Tracker, Variable Delay

Link: github.com/JustAman62/undercut…
Discussion: news.ycombinator.com/item?id=4…


GitHub - JustAman62/undercut-f1: F1 Live Timing TUI for all F1 sessions with variable delay to sync to your TV. Supports replaying previously recorded sessions.

F1 Live Timing TUI for all F1 sessions with variable delay to sync to your TV. Supports replaying previously recorded sessions. - JustAman62/undercut-f1
GitHub

mastodon - Link to source

A Map of British Dialects

Link: starkeycomics.com/2023/11/07/m…
Discussion: news.ycombinator.com/item?id=4…


Map of British English dialects - Starkey Comics

This map took me a long time to make, and is very detailed, but will always be incomplete and inaccurate due to the nature of language. Why this map is so detailed The diversity of English dialects in the United Kingdom is enormous.
Ryan Starkey (Starkey Comics)

mastodon - Link to source

UML diagram for the DDD example in Evans' book

Link: github.com/takaakit/uml-diagra…
Discussion: news.ycombinator.com/item?id=4…


GitHub - takaakit/uml-diagram-for-ddd-example-in-evans-book: UML diagram for the DDD example—a cargo shipping system—from Eric Evans' book

UML diagram for the DDD example—a cargo shipping system—from Eric Evans' book - takaakit/uml-diagram-for-ddd-example-in-evans-book
GitHub

mastodon - Link to source

Show HN: New world record – verified Goldbach Conjecture up to 4*10^18+7*10^13

Link: medium.com/@jay_gridbach/grid-…
Discussion: news.ycombinator.com/item?id=4…


Grid Computing Shatters World Record for Goldbach Conjecture Verification

I’ve achieved a new world record in verifying the Goldbach Conjecture, a famous unsolved problem in mathematics, by extending the verification up to 4 quintillion (4×10¹⁸) + 70 trillion (7×10¹³)…
Hiroaki Jay Nakata (Medium)

friendica - Link to source
Discover 6 powerful Python data validation techniques to transform messy datasets into reliable insights. Learn expert schema validation, deduplication, and parallel data cleaning methods that save hours of debugging.#programming #devto #python #softwareengineering #software #coding #development #engineering #inclusive #community

6 Python Data Validation Techniques That Transform Messy Datasets Into Gold

Aarav Joshi (DEV Community)

friendica - Link to source

Most of you will know how to navigate directories using the cd command and how to create a directory with mkdir. You will also be familiar with the mv command. The mv command is not just for moving files from one directory to another; it can also be used to rename files like this.

mv oldfilename.txt newfilename.txt

In order to list files and directories in the current folder you are in, you may use the ls command.

You can also list files and folders not in your current working directory by providing the directory path with commands like this.

ls /home/John
# to list with more details of files
ls -l /home/John
# to list all files, including hidden files
ls -la /home/John

If you look up the ls command using man ls, you will see that you can pass a lot of options. One of the useful ones is the -t option to sort the files in ascending order of time. For example, if you want to see the latest modified file at the top of the list, use the command below.

ls -t

The ls command sometimes lists a long list of files and directories, but what if you want to filter out files based on the name, time, or some other criteria ? To search through files, one can use the find command.

# finds files in the specified folder with extension .txt and which are newer than the date 2025-01-01
find /home/John -type f -name *.txt -newermt 2025-01-01

There is also an option to execute commands on results using -exec.

Use man find to see the full list of options.

A quick way to find the path of a file or directory is by using the locate command.

locate *.txt

Exploring the manual pages with man can reveal additional options for each command. Familiarizing these tools will enable you to navigate your operating system effectively.#linux #shell #bash #htb #software #coding #development #engineering #inclusive #community


Linux: Finding Files

Most of you will know how to navigate directories using the cd command and how to create a directory...
Mariam Reba Alexander (DEV Community)

mastodon - Link to source

Understanding the Origins and the Evolution of Vi and Vim

Link: pikuma.com/blog/origins-of-vim…
Discussion: news.ycombinator.com/item?id=4…


Understanding the Origins and the Evolution of Vi & Vim

The history of Vi & Vim goes hand in hand with the history of open-source software. This article looks at the historical events that shaped the evolution of these text editors.
pikuma.com

mastodon - Link to source

Cyberpunk 1958: The Early Days of the Polish IT Industry

Link: culture.pl/en/article/cyberpun…
Discussion: news.ycombinator.com/item?id=4…


Cyberpunk 1958: The Early Days of the Polish IT Industry

Long before The Witcher 3 and Cyberpunk 2077 made Poland's tech industry famous, Polish computer scientists and engineers had ambitions to make the country an IT superpower.
Culture.pl

pleroma - Link to source

Source: libsoftiktok

OMG. In 2022, the FBI reportedly told Texas Highway Patrol to release Kilmar Abrego Garcia after he was allegedly transporting someone on the terrorist watchlist during a traffic stop.

Kilmar was reportedly transporting 7 unknown individuals from Texas to Maryland without a valid driver's license, which is a Class B misdemeanor.

This is the "Maryland Man" the Democrats defend.

Original tweet : xcancel.com/libsoftiktok/statu…

pleroma - Link to source

Source: libsoftiktok

Kristi Noem threatens to revoke Harvard's ability to enroll foreign students if the university refuses to share information on visa holders who engaged in violent protests.

“It’s a privilege to have foreign students attend Harvard, not a guarantee”

[Video embedded in original tweet]

Original tweet : xcancel.com/libsoftiktok/statu…

mastodon - Link to source

15,000 lines of verified cryptography now in Python

Link: jonathan.protzenko.fr/2025/04/…
Discussion: news.ycombinator.com/item?id=4…

15,000 lines of verified cryptography now in Python

In November 2022, I opened issue 99108 on Python’s GitHub repository, arguing that after a recent CVE in its implementation of SHA3, Python should embrace verified code for all of its hash-related infrastructure.
Jonathan Protzenko

mastodon - Link to source

Four Years of Jai (2024)

Link: smarimccarthy.is/posts/2024-12…
Discussion: news.ycombinator.com/item?id=4…

Four Years of Jai

I’ve been programming for long enough to be righteously cantankerous about a lot of things. The list of languages, frameworks and libraries I’ve worked with professionally or on personal projects is too long to list – but it includes everything from …
Smári McCarthy

mastodon - Link to source

Show HN: I made a Doom-like game fit inside a QR code

Link: github.com/Kuberwastaken/backd…
Discussion: news.ycombinator.com/item?id=4…

GitHub - Kuberwastaken/backdooms: A self-contained game that fits inside a QR code inspired by DOOM 1993 and The Backrooms

A self-contained game that fits inside a QR code inspired by DOOM 1993 and The Backrooms - Kuberwastaken/backdooms
GitHub

mastodon - Link to source

Less Slow C++

Link: github.com/ashvardanian/less_s…
Discussion: news.ycombinator.com/item?id=4…


GitHub - ashvardanian/less_slow.cpp: Learning how to write "Less Slow" code in C++ 20, C 99, CUDA, PTX, & Assembly, from numerics & SIMD to coroutines, ranges, exception handling, networking and user-space IO

Learning how to write "Less Slow" code in C++ 20, C 99, CUDA, PTX, & Assembly, from numerics & SIMD to coroutines, ranges, exception handling, networking and user-space IO - ashva...
GitHub
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