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Medium

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How Proxies Intercept Behavior in JavaScript Objects

A proxy in JavaScript wraps another object and intercepts interactions with it.
The Proxy constructor takes a target object and a handler object to define interception behaviors.
Proxies don't clone the target object but hold a live reference to it, reflecting changes made to the original.
Handlers define traps for different actions like get, set, has, etc., allowing custom intervention.
Traps are methods on the handler object called by the engine based on the type of operation.
Operations on a proxy are routed through checks to determine if a trap should run.
Traps like get and set intercept property access and value assignments, allowing manipulation or blocking.
Method calls on a proxy can be intercepted using get for object methods and apply for function proxies.
The behavior of a proxy remains consistent regardless of its usage, passing operations through defined traps.
Proxies don't alter the original object but reshape how interactions are handled, providing transparent control.

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Dev

192

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Building a Dynamic Color Changer app with React and Vite

The article discusses building a Dynamic Color Changer app using React and Vite, allowing users to switch between colors, use a color picker, and track color history.
The project features predefined color palette, custom color selection, color history tracking, animations, and copy-to-clipboard functionality.
Tech stack includes React for UI and state management, Vite for development, Lucide React for icons, and Tailwind CSS for styling.
Key features like state management with React Hooks, dynamic background styling, color history management, animation effects, and copy to clipboard functionality are implemented.
UI components breakdown includes color palette with predefined colors, custom color picker, and color history display.
Styling is done with Tailwind CSS featuring glass-morphism effects, responsive design, smooth transitions, and hover effects.
The deploy process involves building the project and then deploying to platforms like Vercel, Netlify, or GitHub Pages.
Lessons learned include effective state management, managing effects timing, creating animations, responsive design, and code structuring.
Future enhancements may include saving color palettes, gradient generation, color scheme suggestions, accessibility features, and exporting palettes as CSS variables.
The project showcases a simple React application offering an interactive user experience through state management, fast development, and efficient styling.

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Dev

178

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Comparing Text Search Strategies pg_search vs. tsvector vs. External Engines

When implementing search in applications, choosing the correct text search approach is crucial. This guide compares PostgreSQL's tsvector, pg_search extension, and external search engines.
PostgreSQL's tsvector offers native full-text search using specialized data structures for optimized search, suitable for basic search needs without extra extensions.
Pros of tsvector include simplicity, integration with Postgres, and low overhead, while cons include limited relevance ranking, no typo tolerance, and complexity with complex queries.
pg_search extends PostgreSQL search with features like relevance ranking, fuzzy matching, phrase search, and flexible queries, making it ideal for more advanced search needs.
pg_search on Neon projects enables better search capabilities without requiring a separate search engine, providing functionality like BM25 ranking and typo tolerance.
External search engines like Elasticsearch offer powerful features but require additional infrastructure, data synchronization, increased complexity, and higher operational costs.
Choosing the right search approach depends on factors like dataset size, search requirements, resources for managing infrastructure, and need for specialized features.
For simpler needs, tsvector is suitable, while pg_search on Neon is recommended for better relevance ranking and typo tolerance without complex setup. External engines are ideal for very large datasets and specialized features.
In conclusion, starting with a simple search approach and scaling up based on needs is recommended, with pg_search on Neon offering a good balance of features and simplicity for many applications.
Selecting the appropriate search strategy enhances user experience while maintaining application architecture simplicity.

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Dev

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Explained: BDD and Cucumber

Behavior-Driven Development (BDD) focuses on system behavior from the user's perspective, fostering collaboration and using natural language.
BDD differs from TDD and traditional development by focusing on outcomes, encouraging collaboration, and using natural language for tests.
Cucumber, a BDD tool, allows writing feature tests in Gherkin syntax and connecting them to actual code for testing.
Cucumber can be used for acceptance testing, documentation, and exploratory testing beyond BDD purposes.
Gherkin, the language format in Cucumber, uses keywords like Feature, Scenario, Given, When, Then to structure tests.
Gherkin serves as a readable format for both humans and computers, used for BDD, documentation, or user stories.
BDD tests involve various roles like product owners, QA specialists, and developers, with collaborative feature file writing.
BDD tests should be part of the main project to ensure test evolution, accessibility, and integration with CI/CD pipelines.
BDD is suitable for projects with complex logic, user interactions, and requiring collaboration between technical and business stakeholders.
BDD tests focus on behavior and outcomes, written in natural language, and test complete features, ideal for integration issues.

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Johndcook

292

Why do LLMs have emergent properties?

Large language models (LLMs) exhibit emergent behaviors when the parameter count is scaled to a certain value, allowing them to perform new tasks.
This emergent behavior is not merely a spurious artifact but a result of the model's capabilities evolving with size.
Emergence is a common phenomenon in nature, with examples like phase changes and system improvements.
In machine learning, examples such as linear regression and k-means clustering illustrate emergent properties with increasing parameters.
Analogous emergence can be seen in algorithms like Boolean circuits designed to perform specific functions.
LLMs' parameter count defines a bit budget spread across various tasks, leading to emergent capabilities as the model grows.
The training process of LLMs influences the emergence of new capabilities, such as accurate arithmetic operations.
Predicting when a new capability will emerge in LLMs, such as writing compelling stories, remains a challenge due to the complexity of internal algorithm discovery.
In conclusion, the emergent properties of LLMs are not surprising given their training and size evolution, although predicting specific emergent behaviors is challenging.
The ability of LLMs to dynamically develop new capabilities based on data presents both opportunities and challenges for understanding and utilizing these models.
Predicting the precise emergence of capabilities in LLMs remains a complex and ongoing area of research.

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Dev

388

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Build a Local RAG 💻 with Ollama, Huggingface, FAISS and Google Gemma 3 ✨

Retrieval-Augmented Generation (RAG) enhances large language models (LLMs) by providing accurate and context-specific answers, addressing issues like 'hallucination' and outdated information.
RAG enables LLMs to offer more relevant responses by combining retrieval-based search with generative language modeling.
The article discusses creating a RAG-powered chat application using technologies like Reflex, LangChain, Ollama, FAISS, and Hugging Face Datasets & Transformers.
Key components include Reflex for frontend, LangChain for application flow, Ollama for running local LLMs, FAISS for similarity searches, and Hugging Face for NLP tasks.
The objective is to build a web-based chat app that utilizes a locally running LLM grounded in retrieved context to provide answers to user queries.
The code structure includes necessary files like .env, requirements.txt, and scripts for RAG logic, state management, and UI in Reflex.
Various libraries like reflex, langchain, datasets, faiss-cpu, sentence-transformers, ollama are integrated to handle different tasks in the RAG application.
Diving into the code, steps involve loading datasets, creating embeddings, building or loading vector stores, initializing the Ollama LLM, and setting up the RAG processing chain.
The UI utilizes Reflex components and customizable styling to create an interactive chat interface for the RAG application.
To enhance accuracy and readiness for production, suggestions include using larger Ollama models, dedicated vector databases, tailored datasets, and improving the chat interface.
The project showcases the synergy of technologies like Reflex, LangChain, FAISS, Hugging Face, and Ollama in creating a locally hosted RAG chat application.

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The Pragmatic Engineer

112

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The Pulse #133: App rushing to add web payments on iOS

Apps rush to add support for iOS web payments in the US following a court ruling that forced Apple to allow web payments on iOS, benefiting app developers and customers.
Figma faced a downside with feature flags when the new Figma Slides feature details were shared by a software engineer due to everything being shipped in their iOS/Android apps, solely protected by a feature flag.
Big Tech companies like Microsoft and Meta claim that 20-30% of their code is generated by AI, showcasing impressive numbers but leaving the productivity benefit of AI-generated code uncertain.
A US antitrust trial involving Google and Apple revealed a drop in Google searches made on iPhones, potentially due to users turning to AI chatbots and search engines instead of Safari's default search function that redirects to Google.

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Medium

265

Design of a Network Vulnerability Scanner: Defining the Scope

The focus is on the design and architecture of a Network Vulnerability Scanner, providing insight into how the scanning components interact and the considerations behind building an effective scanner.
The article highlights the importance of design choices and discusses utilizing tools like Nmap and CVE databases for efficient scanning.
Before delving into specific components, defining the scope of the network vulnerability scanner is emphasized as a crucial step in managing expectations and directing efforts.
The network vulnerability scanner is explained as a system comprising multiple specialized tools that work together, with key players including the scanning engine and various components.

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Crypto-News-Flash

429

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XRP News: Morgan Stanley Labels Ripple a Top Contender in Global Payment Systems

Morgan Stanley recognizes Ripple's role in reducing settlement periods and increasing transaction speeds in cross-border payments.
JPMorgan acknowledges Ripple, SWIFT, and the CLS Group's efforts in addressing challenges in cross-border payments, citing potential savings for banks that adopt Ripple.
Ripple's XRP highlighted as an alternative to SWIFT in global payments by Morgan Stanley and JPMorgan, with a mention of reducing settlement times and fraud risks.
XRP's price is on the rise, currently trading at $2.2 with a 13% surge in the last 30 days, indicating a potential bullish reversal to $15.

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Javacodegeeks

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Understanding Why @Relation Annotations Sometimes Ignore Collection Names in Spring HATEOAS

The @Relation annotation in Spring HATEOAS is used to customize the names of individual resources and collections within hypermedia representations.
Common scenarios where collection names are ignored include incorrect use of assemblers, manual construction of collection models, and missing or incorrect @Relation annotations.
Best practices to ensure proper application of collection names include consistent use of assemblers, verifying annotations, and avoiding manual model construction.
Understanding and following these best practices in Spring HATEOAS can help in avoiding pitfalls where collection names are ignored and ensuring semantic correctness in API representations.

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Logrocket

388

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Why some designers stay stuck at mid-level — And the truth about design titles

Promotions in design are not solely about skillset or years of experience, but can be influenced by factors beyond one's control.
The difference between mid-level and senior designers lies in design execution, product thinking, collaboration, and autonomy.
Senior designers understand product strategy, lead cross-functional teams, and drive measurable business outcomes.
Politics, limited promotion opportunities, and company performance can impact promotion decisions.
Title inflation can lead to disparities in seniority definitions across companies, affecting career progress and comparisons.
Focusing on personal development, high-impact projects, and effective communication can help in navigating career growth.
If feeling stagnant, considering internal opportunities or updating portfolio for external roles can be beneficial.
Ultimately, prioritizing upskilling, impactful work, and personal values over job titles can lead to long-term success in the design field.

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Dev

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How to Integrate Browser Use into Scrapless Scraping Browser?

Browser Use is a browser automation SDK that uses screenshots to capture the state of the browser and actions to simulate user interactions.
To integrate Browser Use into Scrapless Scraping Browser, you need to obtain the Scrapeless API key and set it as an environment variable in your .env file along with the required OPENAI_API_KEY.
You can install Browser Use using pip for Python>=3.11 and for memory functionality, install 'browser-use[memory]' which requires Python<3.13 due to PyTorch compatibility.
Configure the browser and create an automation agent by setting up the browser, agent, and main function to execute tasks on the Web using Browser Use.

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Medium

411

REST API Design: Building Blocks for Scalable Systems

REST APIs utilize HTTP requests for CRUD operations on resources, following six guiding architectural constraints for being truly RESTful.
Key principles include resource identification, client-server architecture, statelessness, cacheability, layered system, and optional code on demand.
REST API design focuses on resources over actions, using nouns for endpoints, standard HTTP methods, and proper use of HTTP status codes.
Best practices include pagination, filtering, versioning, error handling, authentication, rate limiting, HTTPS encryption, documentation, and strategies for evolving APIs.
Common REST API anti-patterns to avoid include ignoring HTTP method semantics, creating operation-based endpoints, returning inconsistent responses, neglecting documentation, and tight coupling between API and client.

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Javacodegeeks

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Java Currency Code Symbol Mapping Example

In Java, you can map currency codes to symbols using the Currency and Locale classes for internationalization support.
The Currency class provides the getSymbol() method to retrieve a currency's symbol based on a specified locale.
You can use Currency.getInstance(currencyCode) to get the Currency object and then obtain the symbol using getSymbol(locale).
Iterating through available currencies with getAvailableCurrencies(), you can map all ISO currency codes to symbols.
For custom mapping, a hardcoded HashMap can link specific currency codes directly to their symbols.
The hardcoded map approach allows full control over symbol display but requires manual updates for new currencies.
The article also discusses using Java's built-in support and a custom solution for currency symbol mapping.
Various Java code examples demonstrate different approaches to mapping currency codes to symbols.
Mapping currency codes to symbols is vital for financial applications, e-commerce platforms, and localization.
Understanding currency code to symbol mapping is essential for displaying accurate currency representation in Java.

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Logrocket

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Why Go wasn’t the right choice for the TypeScript compiler

The TypeScript compiler was rewritten in Go for performance gains, but it raises concerns about ecosystem disruption and maintainability.
While Go offers speed improvements, the existing TypeScript ecosystem's tooling and APIs may face challenges and potential obsolescence.
Choosing Rust over Go could have provided better long-term benefits, such as safety, extensibility, and ecosystem alignment.
Go's limitations in generics support, metaprogramming capabilities, and contributor friction are already noticeable in the TypeScript compiler's migration.
Community feedback indicates a preference for Rust due to its strengths in safety, performance, and familiarity within the TypeScript ecosystem.
The TypeScript team's decision to switch to Go poses risks in terms of long-term maintenance, developer experience, and community acceptance.
While Go excels in CLI performance, concerns arise regarding compatibility issues, such as changes affecting tools like ts-loader.
The move to Go challenges TypeScript's core development feedback loop, potentially widening the gap between building and using the language.
Critics highlight how TypeScript's pragmatic choice of Go may impact community momentum, contributor inclusivity, and ecosystem consistency.
Although Go offers speed benefits, the trade-offs in ecosystem disruption and the potential shift to Rust for compilers raise questions about true pragmatism.
While the Go choice enhances speed, the deeper costs of ecosystem integration and long-term limitations suggest that Rust might have been a more sustainable option for TypeScript's future.

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