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Mastering Python Data Types: What Textbooks Won’t Tell You

Internally, Python caches small integers from -5 to 256 for faster access.
Repeating a string in Python creates a new object each time due to immutability.
Python lists over-allocate memory to minimize resizing operations.
An empty tuple in Python uses less memory than an empty list.

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Medium

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Creating an Arm32 emulator in JavaScript part 3

An Arm32 emulator is being created in JavaScript, with the ability to easily add and remove devices to the CPU for reading and writing to addresses.
A MemoryController interface is being developed to map devices to memory regions, allowing attachment and detachment of devices, as well as read and write operations for 8 and 32 bit unsigned integers.
Implementing the MemoryController involves functions for mapping and unmapping devices, reading and writing unsigned integers, and retrieving devices based on addresses.
The CPU is updated to integrate the MemoryController, providing an abstraction layer for connecting various devices using the address space, enabling communication with different devices from programs.

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Dev

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Angular v20's big launch at Google I/O 2025, Claude Sonnet and Opus 4, TypeScript’s 10x Speed Boost, and more

Angular v20 was unveiled at Google I/O 2025, bringing improvements in server-side rendering, signals, and authoring for faster app development.
Anthropic's Claude 4 (Opus 4 and Sonnet 4) revolutionized coding AI, enhancing JavaScript workflows with precision and efficiency.
TypeScript Native Previews introduced 'tsgo,' a Go-based compiler promising up to 10x faster compilation times for large projects.
ECMAScript 2026 is set to introduce features like new Set methods, enhanced regex, and optimizations for reactive systems, paving the way for improved JavaScript performance.
ESLint v9.0.0 reflected on the flat-config system, introduced in April 2024, streamlining linting processes for JavaScript developers.
Notable tools like Astra, Defuddle, Crosspost, and Peggy were highlighted for enhancing JavaScript development workflows, from creating standalone Windows executables to parsing structured data.
Astra enables compiling JavaScript into standalone Windows executables, while Defuddle helps extract clean content from web pages.
Crosspost facilitates cross-posting content between different blogging platforms, and Peggy offers a parser generator for JavaScript from PEG definitions.
This Week in JavaScript issue 36 covered significant advancements in Angular, coding AI, TypeScript compilation, ECMAScript future, ESLint updates, and noteworthy tools for JavaScript developers.
Stay tuned for more updates and tools in the dynamic world of JavaScript development!

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Dev

340

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Software Development Concepts Project

A programmer completed their first Codecademy project after teaching themselves programming following leaving their Computer Science major.
They finished the "Introduction to IT" module and worked on the Software Development Concepts Project.
The project involved creating algorithm steps, an ANSI flowchart, and writing pseudocode. The pseudocode was shared on GitHub.
The programmer considers this project as a significant step in their learning journey and welcomes feedback on their work.

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Medium

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Optional Chaining in JavaScript Works Differently Than You Think

Optional chaining in JavaScript allows you to safely navigate through an object's structure without causing errors if a value is missing.
The ?. operator checks for null or undefined and returns undefined instead of throwing an error.
Only null and undefined will short-circuit the optional chaining, not other falsy values like 0 or false.
Optional chaining works for nested objects, stopping the chain if any part is null or undefined.
You can use optional chaining not just for property access but also to safely call methods or functions that may not exist.
It is important to note that optional chaining does not convert null or undefined to empty objects but simply stops the chain.
Nullish coalescing (??) complements optional chaining by only falling back on null or undefined values.
Combining nullish coalescing with optional chaining provides a safer way to access data with backup values.
Using ?? and || together in an expression requires parentheses to define evaluation order.
Optional chaining and nullish coalescing change how JavaScript processes data access, avoiding unexpected behavior and errors.

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Medium

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Can I Recover Dogecoin Sent to the Wrong Wallet?

Dogecoin transactions, like other cryptocurrencies, are final and irreversible once confirmed on the blockchain.
If Dogecoin is sent to the wrong address, recovery options vary based on the recipient's control over the wallet.
Recovery may be possible by accessing the destination wallet with the private key, contacting exchanges for support, or if sent to an address intended for another blockchain.
Lost Dogecoin may be recoverable if sent to a known entity, but if sent to an invalid or burned address, the assets are lost forever.

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Dev

161

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🔥 Stop Leaking Data: Instantly Encrypt Your API Calls with secure-fetch-sdk

secure-fetch-sdk is a lightweight JavaScript library designed to encrypt API calls with payload encryption, obfuscated routes, and optional middleware integration.
Key features include end-to-end encryption, easy integration for Node.js and browser environments, flexible deployment options, and minimal overhead.
The library encrypts request bodies, obfuscates query parameters or route segments, and seamlessly decrypts on the backend using provided middleware or proxy servers.
For documentation, examples, and quick-start guides, visit the GitHub repo or run: npm install secure-fetch-sdk to start encrypting API traffic.

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Dev

328

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Avoiding Meltdowns in Microservices: The Circuit Breaker Pattern

The Circuit Breaker pattern acts as a protective barrier in software, stopping requests to prevent system-wide issues during failures.
It prevents load amplification and metastable failures by breaking the flow when a service becomes unreliable.
The pattern operates in Closed (normal operation), Open (fail fast), and Half-Open states to control request flow.
Aerospike employs the Circuit Breaker pattern in its client libraries, reducing system impact during network outages.
By implementing the Circuit Breaker, systems can contain failures and recover more gracefully, as shown in an example scenario.
Thresholds for the Circuit Breaker can be adjusted based on workload needs, such as error rates handled per second.
Configuring the Circuit Breaker in Java involves setting error rate thresholds and handling failures appropriately.
For scaling systems, understanding connection limits and logging impact helps in tuning Circuit Breaker thresholds effectively.
The Circuit Breaker is a powerful tool but requires careful configuration and should be complemented with other strategies like timeouts and retry policies.
In distributed systems, failure resilience is crucial, with the Circuit Breaker serving as a safety valve to limit failure impact.

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Dev

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OOP Cookies: Baking Object-Oriented Programming Concepts

Object-oriented programming (OOP) is likened to baking cookies, where a base class defines common features and specialized subclasses add unique characteristics.
Core OOP concepts explored include inheritance, encapsulation, and polymorphism using a cookie-making analogy.
The Cookie base class contains essential properties and methods, serving as a foundation for subclasses like ChocolateChip, Raisin, and HeartSprinkle that customize ingredients and behaviors.
Polymorphism is demonstrated through the oven analogy, showing how a single method call (bake()) can produce different results for each cookie type.

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Dev

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🌀 Real-Time Python CLI Dashboard with rich and pyfiglet — Now It’s ALIVE ⚡

Built a real-time Python CLI dashboard using rich and pyfiglet for terminal system monitoring.
Included features like live system monitoring for CPU/RAM usage, task overview, and a live clock.
Implemented beautiful layout with header, body, and footer using rich panels for seamless updates.
Used libraries like rich, pyfiglet, psutil, and Python's datetime for dynamic terminal visualization.

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Dev

381

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🚀 I Built a Static CLI Dashboard in Python Using rich and pyfiglet – Looks Nerdy, Works Smart 😎📊

A Python-based CLI dashboard was built to display system stats and tasks using libraries like rich, pyfiglet, and psutil.
The dashboard includes a System Info Panel showing OS, processor, machine type, and boot time, and a Task Tracker for tracking operations.
It features a beautiful layout split into sections, a nerdy footer message, and uses libraries like rich, pyfiglet, and psutil.
The code includes functions to fetch system stats and display them, along with a task table and a footer displaying a motivational message, providing a satisfying terminal dashboard experience.

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Medium

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The Strategic Evolution of Programming Languages: A Journey Through Code, Business, and Opportunity

This bar chart showcases the peak popularity of major programming languages and the approximate years they reached peak usage.
Programming languages have evolved from machine code in the 1940s-50s to the AI, Cloud, and Mobile frontier of the 2020s, reflecting different eras' needs and ambitions.
These languages are pivotal in driving innovation, economic leverage, and strategic advantage across industries and job markets, shaping the digital transformation landscape.
As we advance into a future led by quantum computing, ethical AI, and decentralized systems, new languages will emerge, with code remaining the pivotal currency of progress.

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Dev

382

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Want to Build India's Biggest Student Dev Community? Start Here

TheCampusCoders is looking for energetic college students to join as Community Growth Manager Interns to build India's most active student dev community.
The role involves building awareness, driving engagement, and growing a developer-first community within the college by sharing tutorials, hosting meetups, and promoting resources.
Ideal candidates are passionate about tech, active in campus tech clubs, good at networking, and looking for internship experience in community building and growth marketing.
Perks include certificates, mentorship, priority access to opportunities, and exclusive community leader benefits for successful candidates.

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Dev

420

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10 Common Mistakes in ASP.NET Core and How to Avoid Them

1. Not Using Dependency Injection Properly: Register services correctly and stick to constructor injection with the correct lifetime.
2. Forgetting to Validate User Input: Use model validation attributes like [Required], [StringLength], and [EmailAddress].
3. Hardcoding Configuration Settings: Avoid hardcoding settings like connection strings by using appsettings.json and IConfiguration.
4. Ignoring Asynchronous Programming: Utilize async/await properly to prevent deadlocks and enhance scalability.

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Medium

203

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Unlocking Developer Productivity: A Deep Dive into Claude AI’s Coding Capabilities

Claude AI, developed by Anthropic, is gaining attention as a developer assistant for improving productivity in coding workflows.
Claude AI stands out in its way of handling code, potentially becoming one of the top AI tools for developers.
It is important to verify the accuracy of information about Claude AI, especially before relying on specific features for real projects.
Developers have shown interest in tools like ChatGPT, including GPT-4, for their reliability and efficiency in natural language processing.

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