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I Built My Own Programming Language and its Virtual Machine In Python!

The article discusses the author's journey of building their own programming language called Pyle and its virtual machine in Python.
Pyle serves as an educational project to understand the inner workings of programming languages and how text translates into computer instructions.
The article describes the stages involved in the language processing pipeline from lexer to parser, compiler, and stack-based virtual machine (VM).
Pyle can handle variables, numbers, strings, arrays, arithmetic, logical, comparison operations, loops, function definitions, and even importing Python modules.
A showcase example in JavaScript syntax demonstrates creating a function to check for prime numbers and using the importpy function to get a random number for testing.
Building Pyle has provided the author with a deeper understanding of compilers and virtual machines, enhancing their appreciation for programming tools.
The article concludes by encouraging readers to explore such projects for a better understanding of programming concepts, with the Pyle project available on GitHub.

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A new passion; and a new project! A ThreeJS Physics Simulation

Individual has created a web-based 3D skydiving simulation software using ThreeJS.
The simulation is designed to realistically visualize a skydive from exit to canopy deployment.
The creator was motivated by returning to school for a Physics degree and completing a skydiving training program.
They noticed a lack of tools for visualizing skydiving situations, leading to the development of this software.
The simulation aims to help jumpers understand spatial awareness, separation, freefall dynamics, and wind effects.
Features include a frame-by-frame time scrubber, modular UI components, and a flexible camera system.
Real weather data based on location and dynamic satellite imagery of dropzones are incorporated.
Users can choose from different planes with varying flight characteristics.
The project is in its early stages with the goal of assisting skydivers in preventing injuries and accidents.

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Dev

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Pair Programming against Agentic Dementia

The article discusses the challenges of AI-assisted development and proposes pair programming as a collaborative solution to mitigate the cognitive costs associated with AI coding assistants.
Pair programming is presented as a human-centered approach that fosters collaborative problem-solving and distributed intelligence, outperforming individual work or AI dependency.
Benefits of pair programming include improved code quality, better documentation, enhanced knowledge transfer, and real-time error prevention, addressing long-term productivity and system maintenance.
The collaborative nature of pair programming facilitates knowledge sharing, skill development, and meta-cognitive awareness among developers, leading to resilient and adaptable development teams.
Pair programming offers economic advantages by reducing maintenance costs, accelerating onboarding, minimizing risks of personnel changes, and enhancing competitive advantage in an AI-driven environment.
The article addresses common objections to pair programming, such as perceived inefficiency and individual work preferences, emphasizing the long-term value creation and sustainable benefits of collaborative practices.
As AI systems advance, the future of human-centered development lies in balancing human cognitive capabilities with AI tools, with pair programming serving as a practical strategy to empower developers and maintain critical thinking skills.
Pair programming is positioned as an investment in human capability, offering a path to preserve essential human elements in software development and navigate the evolving landscape of AI integration.
By choosing collaborative approaches like pair programming, developers can foster deep thinking, effective collaboration, and problem-solving skills essential for success in an AI-augmented future.
The article advocates for prioritizing human agency, genuine learning, and intellectual satisfaction in software development by embracing practices that combine human expertise with technological advancements.

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Dev

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From Theory to Impact: Implementing Shift-Left from Scratch

Shift-left testing emphasizes moving testing activities earlier in the development process for improved software quality, test coverage, continuous feedback, and faster time to market.
Benefits of shift-left testing include cost savings, increased efficiency, early bug detection, faster development, developer wellbeing, resilient architecture, greater overall quality, and better collaboration.
Limitations of shift-left testing involve increased initial investment, quality of automated tests, limited scope, resource intensiveness, code audits, and difficulty in managing test data.
Implementing shift-left involves starting testing early, adhering to the test pyramid, using the INVEST method for user stories, utilizing CI/CD, and maintaining clear communication between teams.
Clear communication is highlighted as a crucial aspect for successful implementation of shift-left testing, facilitating collaboration and understanding between developers and testers.
Shift-left testing is deemed beneficial, but it requires more than just automated tests for successful implementation, emphasizing the importance of clear communication and effective team collaboration.

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✨ Everything You Need to Master the DOM

The DOM (Document Object Model) is crucial for web development, allowing interaction between HTML and JavaScript.
This comprehensive guide covers DOM manipulation methods for selectors, content, styling, classes, node traversal, event handling, and dynamic element creation.
Selectors like getElementById, getElementsByClassName, getElementsByTagName, querySelector, and querySelectorAll help interact with DOM elements.
Methods like innerHTML, innerText, textContent, and value aid in content manipulation within elements.
Styling elements can be done using inline styles directly on elements or by accessing computed styles.
Classes can be added, removed, toggled, or checked using classList property efficiently.
Node traversal involves accessing parent, child elements, sibling elements, and creating/inserting elements dynamically into the DOM.
Attribute management methods like setAttribute, getAttribute, removeAttribute, and hasAttribute can be used to manipulate element attributes.
Events and event listeners like click, submit, change, mouseover, and keydown add interactivity to elements.
Inline events can be attached but are not recommended for maintainability.
The article provides a dynamic element creation example and emphasizes mastering the DOM for interactive web applications.

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PlanetPython

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PyCoder��s Weekly: Issue #687: Scaling With Kubernetes, Substrings, Big-O, and More (June 24, 2025)

Calvin Hendryx-Parker discusses scaling web applications with Kubernetes and Karpenter on REAL PYTHON podcast.
Different methods for detecting vowels in a string are covered in an article by Austin Z. Henley.
A checklist is provided to prevent Postgres slowdowns on Python apps by PGANALYZE sponsor.
Exploration of real-world performance and Big-O expectations is discussed in an article by MRSHINY608.
Registration for PyOhio 2025 is now open on PYOHIO.ORG.
Updates on Python 3.14.0 Beta 3 and various software releases like 'ruff 0.12.0' and 'streamlit 1.46.0' are shared.
Details on Python events like PyCamp Leipzig, PyDelhi User Group Meetup, and PyCon Colombia 2025 are provided.

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Medium

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Why TypeScript Structural Typing Works

TypeScript checks types based on the shape of values rather than where and how they were declared.
This is known as structural typing, in contrast to nominal typing used in most statically typed languages.
TypeScript focuses on the structure of values to ensure compatibility, enabling more flexible coding.
It allows for handling extra fields in objects as long as the required structure matches.
TypeScript performs type checking by examining object structures property by property, even for nested values.
Interfaces in TypeScript serve as structural contracts rather than carrying identity.
Structural typing enables easier reuse of functions with varying inputs as long as the shape requirements are met.
However, the flexibility of structural typing may lead to security vulnerabilities if not accompanied by appropriate checks.
TypeScript's focus on shape comparison can be advantageous for writing versatile functions but requires additional security measures at runtime.
Care must be taken with structural typing in scenarios where object shape alone determines access or authorization.

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Creating User Menus in Java with Loops and Switch

A working menu stays active by repeating the same code until the user chooses to exit.
Loops in Java follow simple rules, with while loop running as long as a condition is true and do-while loop running the body at least once before checking the condition.
A do-while loop is often smoother for handling menus as it does not require preloading the condition.
The switch statement in Java is used to match user's choice to a fixed set of possible actions in menu-driven programs.
Validation is crucial in menu code to handle input errors and ensure stability by catching bad input early.
Using hasNextInt() before reading a number helps prevent program crashes when user input does not match the expected type.
In console menus, input checks are essential for building well-built interfaces and safer tools by expecting user mistakes.
API keys and authentication play a role in real access controls for remote systems, ensuring trust in user requests.
Implementing a basic login gate inside a menu can mimic user-based access control for protected data.
Understanding and implementing these menu structures early can lead to clear, safe, and enforced rules for user interactions in programs.

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Medium

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Serving Images Outside the Static Folder in Spring Boot

Spring Boot serves files by default from classpath folders like static, public, resources, and META-INF/resources without explicit controller code.
When serving files outside these folders, you need to specify the location using a property or WebMvcConfigurer.
Handling custom images involves mapping a controller route to a physical file path and checking its existence.
For large files, streaming directly from disk is advised to avoid memory strain.
Proper MIME type detection is crucial for browsers to display images correctly.
Preventing traversal attacks involves building the path from a fixed directory, normalizing it, and checking permissions.
Using API keys for file access separation between trusted requests and random traffic is recommended.
Authentication and permission checks are necessary when files are user-specific.
Caching strategies should be tailored based on the sensitivity of the content being served.
Control over file serving allows for customized handling of requests and content delivery.

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Medium

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10 Pythonic Tips I Wish I Knew Sooner as a Data Scientist

The author shares 10 Pythonic tips for data scientists to write more elegant, readable, and faster code.
Initially, the author's code was verbose and clunky with for loops and temporary variables.
After learning the Pythonic way, the author found a better approach to coding.
The tips include real-world DataFrame examples and explanations of why they are important.
The tips helped the author become faster and more confident in their work.
The examples are based on a simple DataFrame resembling e-commerce or customer analytics data.

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Medium

409

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When navigating the fast-moving world of crypto, it’s often the steady flow of updates new…

BingX is hosting a Humanity Protocol $H Listing Carnival event from June 24th to July 1st with a 170,000 USDT prize pool.
The event aims to promote the launch of $H on the platform and incentivize early engagement and trading.
Participants need to register, complete identity verification, and engage in depositing and trading $H during the specified period.
Certain regions such as Indonesia, Pakistan, and Bangladesh are excluded from participation due to compliance reasons.
The event provides opportunities for both existing BingX users and newcomers to benefit from the $H listing.
BingX has outlined transparent rules for the event, including reward calculations and regulations against wash trading and multi-account abuse.
Humanity Protocol suggests a focus on identity, privacy, or decentralized governance in the evolving blockchain applications landscape.
Investors are advised to conduct independent research on the project's fundamentals before participating in the Humanity Protocol listing event.
Listing events like this provide opportunities rather than guaranteed returns, highlighting potential entry points for informed investors in the crypto market.

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Medium

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The Million-Dollar Movie Marathon: How Netflix Turned Recommendation Into Competition

In 2006, Netflix launched a competition offering one million dollars to improve their movie recommendation algorithm by 10%.
The aim was to predict what viewers wanted to watch before they knew it themselves.
Netflix's existing recommendation system, Cinematch, was decent but not groundbreaking.
The competition aimed to enhance the accuracy of movie suggestions beyond basic correlations.
The winning team had to develop an algorithm that surpassed Cinematch's capabilities by 10%.
The dataset provided for the competition was anonymized user ratings of movies.
Contestants worked to innovate predictive models to improve recommendations.
The Netflix Prize attracted global participants, including data scientists, engineers, and academics.
Teams collaborated to harness the power of machine learning and data analysis.
This competition marked a shift towards personalization in the entertainment industry.
The ultimate goal was to provide viewers with tailored recommendations based on their preferences.
The success of the Netflix Prize demonstrated the power of competitions in driving innovation.
The story showcases how Netflix leveraged competition to enhance user experience in content consumption.

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Dev

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Rails with ROM.rb: Life After ActiveRecord

The article discusses using ROM.rb (Ruby Object Mapper) as an alternative to ActiveRecord in Rails applications.
The Pain Points with ActiveRecord include performance issues, testability challenges, and maintainability concerns.
ROM.rb offers explicit data layers, fast SQL operations, and decoupled business logic.
Core concepts of ROM.rb include relations (new model structures), repositories (query layer), and changesets (write layer).
Gradual adoption of ROM.rb in Rails involves steps like replacing models, rewriting controllers, and migrating queries.
ROM.rb provides performance gains by eliminating lazy loading and callback issues compared to ActiveRecord.
Recommendations on when to stick with ActiveRecord include for prototyping, simple CRUD apps, and teams resistant to change.

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Dev

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Pinning GitHub Actions and using ratchet

Pinning GitHub Actions is important for security to ensure dependencies are locked to specific versions.
The practice of pinning actions is recommended and made easier with tools like Dependabot.
A tool called 'ratchet' assists in pinning dependencies by providing commands like lint, pin, unpin, update, and upgrade.
Usage of ratchet involves running commands in the project directory to manage unpinned versions in GitHub Actions workflows.
Ratchet helps identify and resolve unpinned references, making it clear which dependencies require pinning.
After running 'ratchet pin', the tool generates diff changes to show the pinned versions in the workflow files.
Replacing references with specific commit hashes maintains stability, as demonstrated by the example with 'nosborn/github-action-markdown-cli'.
Verifying commit hashes against the tagged versions ensures the pinned dependencies match the intended versions.
Maintaining pinned versions enhances security and stability but requires diligence in updating dependencies.
Ratchet offers commands like update and upgrade to manage pinned versions efficiently.
Running 'ratchet unpin' can revert back to unpinned versions if needed, providing flexibility in managing dependencies.
Adopting best practices with tools like ratchet can help streamline dependency management in GitHub Actions workflows.

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Medium

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Why JavaScript Developers Struggle to Learn

JavaScript has evolved significantly since its inception in 1995, resulting in frequent updates through ECMAScript standards like ES6 in 2015.
New features such as arrow functions, destructuring, and async/await require developers to consistently enhance their knowledge.
The vast JavaScript ecosystem includes frameworks (React, Vue, Angular), libraries (jQuery, Lodash), and tools (Webpack, Babel, npm).
Keeping up with the rapidly changing landscape of JavaScript can be overwhelming, especially for beginners.
The high volume of tools and updates leads to a steep learning curve, making developers feel pressured to learn everything quickly.
To overcome these challenges, developers should focus on mastering core JavaScript concepts before delving into frameworks or tools.
It's important to stay updated using reliable resources like MDN Web Docs or JavaScript-focused newsletters.
Prioritize practical application over constantly chasing trends in the JavaScript ecosystem.

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