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Dev
1w
196
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2025 NestJS BE Roadmap: Beginner to Senior Level
- NestJS roadmap for 2025 guides developers from beginner to senior level.
- The roadmap focuses on mastering NestJS concepts, tools, and best practices.
- It includes key learning areas such as core concepts, TypeScript basics, building APIs, validation, database integration, and more.
- The roadmap also suggests projects for each level and provides additional learning resources.
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Dev
1w
21
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[React - Learn From Problem] Each child in a list should have a unique 'key' prop
- The warning 'Each child in a list should have a unique 'key' prop' in React occurs when rendering lists of elements, such as when using the map() function to generate an array of components.
- The key prop is important for efficiency in re-renders, providing stable identity, and avoiding bugs.
- The key should be unique and consistent for each item in the list.
- Common mistakes include using the array index as the key and having non-unique keys.
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Dev
1w
234
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Building a Personal Brand and Embracing Adaptability as a Software Engineer 💯
- Building a personal brand and embracing adaptability are essential for software engineers.
- Building a Personal Brand:
- - Write blog posts to share knowledge and establish authority.
- - Create a portfolio to showcase your work and skills.
- - Contribute to open-source projects to learn, network, and showcase collaboration.
- - Attend tech meetups and conferences to learn, network, and gain inspiration.
- - Share knowledge online through platforms like LinkedIn, GitHub, and Twitter.
- Embracing Adaptability:
- - Learn effective debugging techniques to solve problems efficiently.
- - Embrace change and stay curious to thrive in the evolving tech world.
- - Stay resilient by reflecting on failures and maintaining a growth mindset.
- - Be a lifelong learner through following industry updates and experimenting with new technologies.
- Building a personal brand establishes thought leadership, while adaptability helps navigate the tech world with confidence.
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Medium
1w
225
Method Level Security Using SpEL
- Spring Security offers various authentication mechanisms, including username/password authentication, OAuth 2.0, OpenID Connect, and more.
- Basic authentication is a simple method for securing REST APIs or other services, while OAuth 2.0 and OpenID Connect provide more sophisticated authentication options.
- Authorization, distinct from authentication, determines what a user is allowed to do after successful authentication. Spring Security provides fine-grained control over access to resources using techniques like role-based access control (RBAC) and access control lists (ACLs).
- Method Level Security Using SpEL allows for granular control over access to individual methods based on factors like user roles, request parameters, and the current time.
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Dev
1w
290
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Raise The Red Flag Early: The Power of Explicit Return Types in TypeScript
- Developers can use explicit return types in TypeScript to prevent errors before they occur.
- Implicit returns can lead to runtime errors and make it difficult to track down issues.
- Explicit return types help raise errors at the function definition, improving code reliability.
- They also serve as documentation and communicate what a function is expected to return.
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Medium
1w
272
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Learning Go Generics Through Real OSS Examples
- Go Generics can be used to simplify and improve utility functions.
- The samber/lo library demonstrates the usage of Go Generics in Map, Filter, and error handling.
- The Map function applies a predicate to a given slice and returns a new slice of matching elements.
- The Must function in samber/lo provides a generic approach to error handling.
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Dev
1w
277
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Web Components: An Introduction
- Web Components are a way to build components using vanilla JavaScript and widely available browser APIs that can be shared across frameworks.
- Web Components are divided into two categories, autonomous and custom built-in elements.
- Autonomous Web Components are more flexible, and Custom Built-In elements are meant to augment the functionality of existing HTML elements.
- When naming Web Components, the element name must begin with a lowercase letter and include a hyphen.
- Web Components have specific lifecycle hooks that are used for initialization and cleanup of component instances.
- Accessibility is an important consideration in Web Components, and ARIA attributes can be used as in regular HTML or a framework.
- Web Components have a separate scoped piece of the DOM called the Shadow DOM which can be set to open or closed modes.
- Templates and slots can be used with the Shadow DOM to enhance Web Components by creating reusable snippets within them.
- Web Components can be used on modern browsers; however, Safari does not support Custom Built-In Elements.
- Web Components examples were discussed, including Autonomous Custom Element, Custom Built-In Element and Wrapping Up.
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Dev
1w
102
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Making Live Coding Demos Easier with Demo Time
- Demo Time is a Visual Studio Code extension created to make live coding demos easier and stress-free.
- Key features include step-by-step guidance, automation readiness, visual indicators, and customization options.
- It was developed to balance technical accuracy with audience engagement during live presentations.
- Use cases for Demo Time include tech conferences, workshops, and internal training sessions.
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Medium
1w
358
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React Diffing Algo
- The diffing algorithm works under the assumption that components are immutable — meaning that React assumes components don’t change over time but re-render with new data.
- It uses heuristics to optimize the process of determining what parts of the DOM need to be updated.
- React's diffing algorithm achieves efficient updates through element reuse, key props, and children diffing.
- By comparing the new virtual DOM to the old one, React can minimize DOM manipulations and provide a fast user experience.
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Medium
1w
59
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Inheritance and Polymorphism in Java| Understand These Concepts Better Through Actual…
- Java concepts, like late binding, method overriding or overloading as well as to wahat point your program is going to allow your mistakes; I mean whether you are going to get a compile or runtime error.
- Exercise 1: Calls Dog’s overridden sound method.
- Exercise 2: Throws ClassCastException at runtime because v is not an instance of Car.
- Exercise 3: Throws ClassCastException at runtime because p is not an instance of Child.
- Exercise 4: Fails at runtime (ClassCastException) because obj is not an instance of C.
- Exercise 5: Fails at runtime (ClassCastException) because s is not an instance of Circle.
- Exercise 6: Throws ClassCastException because a is not an instance of Cat.
- Exercise 7: Works because app points to a WashingMachine instance.
- Exercise 8: Fails at runtime (ClassCastException) because f is not an instance of Apple.
- Exercise 9: Calls the overridden method in Student.
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Dev
1w
302
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Understanding Java Inheritance: A Friendly Guide 🌳
- Inheritance in Java allows classes to inherit traits from their parent class.
- It helps in code reusability and organization.
- Child classes automatically get all the features of the parent class.
- Additionally, child classes can override parent class methods to change their behavior.
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Dev
1w
298
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My Go-To Developer Tools: Boosting Productivity and Joy in Coding
- Visual Studio Code (VS Code) is a highly customizable code editor with integrated terminal, IntelliSense, and collaborative features.
- Git and GitHub provide version control, collaboration, and learning resources for software development projects.
- Postman is a tool for API testing, with features like easy API testing, collection runner, and documentation generation.
- Docker allows for consistent development environments, containerization of applications, and community support for pre-built images.
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Dev
1w
200
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Some tips to help make the code cleaner.
- The Clean Coder book emphasizes principles of professionalism, discipline and clean, maintainable code for effective software engineering.
- Take responsibility for your code and write code you're proud of. Adopt a craftsman mindset and balance performance, readability and maintainability.
- Code readability should be written so that others can easily understand it. Simplicity over Cleverness to avoid writing overly clever or cryptic code.
- Components should handle only rendering/UI. Logic should encapsulate reusable logic and styles should be abstracted.
- Each line of code should tell a story and flow logically. Good tests describe behavior and requirements, not implementation details.
- Refactor relentlessly and learn new tools and techniques. Break down features into smaller, incremental deliverables to avoid over-commitment.
- Communicate early and often with designers, product managers, and backend developers. Engage actively in peer code reviews.
- Architect your codebase to ensure maintainability. Separate UI from State Management and use dependency injection.
- To become a master front-end developer in 2025, it's essential to embrace professionalism, clean code principles, and a mindset of continuous improvement.
- Apply these techniques and principles daily. Over time your code will reflect both technical excellence and craftsmanship.
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Dev
1w
119
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Nuxt.js in action: Vue.js server-side rendering framework
- Nuxt.js is a popular server-side rendering (SSR) framework built on top of Vue.js.
- It follows a specific directory structure, such as pages/ for routes, store/ for state management, and plugins/ for Vue.js plugins.
- Nuxt.js divides the page rendering process into two stages: server-side rendering (SSR) and client-side rendering (CSR).
- Nuxt.js supports dynamic routing, middleware for route handling, and asyncData for server-side data fetching.
- Nuxt.js also provides a way to generate pre-rendered static HTML files for better performance and SEO.
- You can use Vue ecosystem tools such as Vue Router, Vuex, ESLint, and TypeScript with Nuxt.js.
- To optimize performance, you can use techniques such as code splitting, lazy loading, asynchronous data prefetching, and HTTP caching.
- Nuxt.js also provides features for error handling, validation, and workflow using its CLI tools.
- Integrating Nuxt.js with additional plugins is also possible, such as the popular Vee-Validate library for form validation.
- Overall, Nuxt.js provides an efficient and scalable way of building server-side rendered Vue.js applications.
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Medium
1w
371
How Computers Works:
- A computer is an electronic gadget that processes information, or 'data.' It reads in information, processes that information, and produces some kind of output.
- Key components of a computer include input devices, such as keyboards and mice, which allow users to input information.
- The central processing unit (CPU) is the brain of the computer, responsible for processing instructions and performing calculations.
- Memory (RAM) temporarily stores data the CPU needs while working, while storage devices save data permanently.
- Output devices like monitors, printers, and speakers present the results of the computer's work.
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