Learning Concurrency and Functional Programming with TypeScript (Wednesday Coding Session ep.1)

Cultivate advanced programming language utilization skills and software design and implementation skills combining functional, object-oriented, and LISP paradigms, necessary for growing into a mid-to-senior level developer.

This course is a series of courses on functional programming and JavaScript ES6+, covering a variety of application cases.

This is a course where you can learn ES6+ and functional programming. This course covers and applies the iterable/iterator/generator protocols of ES6+ in detail. You can learn functional programming based on iterables, map/filter/reduce, pipelines, lazy evaluation through generators, promise composition, concurrency/parallelism, async/await and asynchronous error handling, etc. Master this course and practice to become an intermediate JavaScript developer!

This is a lecture on functional programming by CTO In-dong Yoo of Marpple (http://www.marpple.com). You can create your own library with functional programming and experience the paradigm of functional programming and the joy of coding.

⚡ Short and sweet full 160-minute course! Copy and paste code from website to website and learn reactive programming with ReactiveX 😎

Learn Springboot + NextJS RestAPI Board Creation Faster Than Anyone! Develop a CRUD server with Springboot and create your own board with NextJS!

Have you ever felt frustrated while studying React? We'll help you build a solid foundation in the basics of JavaScript, which is the foundation of React, and then learn step-by-step, so you can open the way to React without giving up.

This is an all-in-one course that takes you from the basics of TypeScript-based Next.js 16+ to a production-ready project level. You will learn by directly implementing core concepts and practical patterns of the latest Next.js, including App Router, Server Components, Server Actions, Caching, Cache Components, authentication, performance optimization, and deployment.

Go beyond syntax to understand the principles and concepts—if TypeScript still feels confusing no matter how much you study, it's time to learn it properly! We will turn you into a TypeScript Wizard🧙🏻‍♀️.

This is a course where you can learn ES6+ and functional programming. This course covers and applies the iterable/iterator/generator protocols of ES6+ in detail. You can learn functional programming based on iterables, map/filter/reduce, pipelines, lazy evaluation through generators, promise composition, concurrency/parallelism, async/await and asynchronous error handling, etc. Master this course and practice to become an intermediate JavaScript developer!

In this course, you will be able to create a Reddit website from scratch, step by step.

This is a TypeScript course designed to help you become a top-tier web developer through in-depth lessons. By completing this course, you will gain a profound understanding of the essence of TypeScript, enabling you to master React, Next.js, NestJS, and more.

I recommend this to those who want to learn how to easily create and distribute Android apps, Windows apps, and iOS apps. We will teach you the basics of TypeScript rather than JavaScript and Angular!

The Next.js 15 App Router is a powerful architecture for building high-performance web services by perfectly controlling the boundary between server and client. This course clearly connects complex rendering mechanisms—from the operating principles of React Server Components (RSC) to the three major caching strategies (Static, Dynamic, and ISR)—through 12 practical missions. Through this, you will gain the ability to design file-system routing and nested layouts according to business requirements, completely breaking free from the anxiety of "vibe coding" where you copy code without understanding the principles. Ultimately, you will evolve into a Next.js architect who can instantly spot the blind spots in AI-generated code and proactively direct the optimal structure.

We develop an avatar-based community app with React Native. You'll learn to build a comprehensive community app, covering post creation, comments/replies, likes, voting, avatar generation, etc.

Study the Elm programming language guide to building front-end web apps with pure functional programming in just 3 hours.

Scala allows you to write much more concise and robust code quickly, while still leveraging the experience you have gained as a Java developer. This course is designed for Java developers to quickly understand the overall look of Scala based on their existing Java knowledge. If you are an existing Java developer, you can learn Scala very easily.

Learn what concurrency issues are and how to deal with them.

You can gain the ability to implement a chat program in just one hour using Next.js + Cursor IDE.

You can quickly learn about virtual threads supported from spring boot 3.2.0 (+ JDK 21) and get hints on performance improvement in just 1 hour for free.

This is a course where you will build a map service from scratch using the MERN stack (feat. TypeScript). Let's build it step-by-step while following the official API documentation.

# Covering Swift Concurrency from A to Z (Part 1)

"Why did the AI write this code?" or "Why can't it remember what I just said?" The frustration you encounter when using AI tools like Claude Code stems from not knowing how the tool actually works. This course flings open that black box. Over 25 lessons, we will build our own Coding Agent from scratch that functions exactly like real-world professional tools—giving the LLM 'eyes' to see files (Read), 'hands' to fix code (Edit), and 'feet' to execute commands (Bash). This isn't just about learning how to use a library. You will gain hands-on experience by implementing code to understand how AI perceives project structures, why it loses its memory during long conversations, and how to solve those issues technically (Sliding Window, Summary). Through this process, you will evolve from being a mere 'user' of AI tools to an 'AI provider' who understands the underlying principles and can customize and evaluate tools to fit your specific needs.

This is a free 1-hour introductory lecture to get you started with just the OpenAI API. You will quickly master core concepts including the Responses API, JSON response handling, validation, idempotency, and logs, while learning a practical backend workflow that allows for immediate testing without the need for external service keys.