Functional Object-Oriented Programming in ReasonML

ReasonML combines the power of functional programming with a robust, expressive type system. If you want to understand how functional languages handle object-oriented concepts, building a reliable calculator is the perfect entry point. This text-based course guides you step-by-step through implementing an object-oriented calculator capable of performing precise floating-point mathematical operations. You will start with the absolute fundamentals, exploring ReasonML's syntax, type system, and functional paradigm before writing a single line of object code. Then, you will construct a clean, closed calculator object that handles addition, subtraction, multiplication, and division safely. What you'll learn: - Understand the core principles of functional programming and how they intersect with object-oriented design in ReasonML - Define clean, type-safe structures to handle float-based mathematical calculations without side effects - Implement basic arithmetic operations including addition, subtraction, multiplication, and division - Handle edge cases such as division by zero using safe, modern error-handling patterns - Write robust unit tests to verify your object's behavior and ensure high code quality This comprehensive text-only guide provides clear, written explanations alongside practical code examples. You will progress naturally from basic syntax to structured object design and testing. This course is designed for beginners who are new to ReasonML or functional programming and want to learn how to build structured, type-safe applications. No prior experience with ReasonML is required. Start reading today to master functional object design in ReasonML.