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Using fp-ts for Functional Programming in TypeScript

Gain insights into functional programming with TypeScript. Learn about core fp-ts functionality and monads like Option and Either to enhance your TypeScript projects effectively.

Intermediate

111 Lessons

30h

Certificate of Completion

Gain insights into functional programming with TypeScript. Learn about core fp-ts functionality and monads like Option and Either to enhance your TypeScript projects effectively.

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This course includes

112 Playgrounds

10 Quizzes

Course Overview

What You'll Learn

Course Content

Course Overview

Functional programming is a programming paradigm that emphasizes immutability and pure functions. It not only makes code easier to understand, test, and parallelize, but also offers improved performance. TypeScript is a statically-typed object-oriented programming language that builds on JavaScript. Although TypeScript is not a purely functional programming language, it can be used to write functional code too. This course is for beginners with little to no knowledge of TypeScript and functional programmi...Show More

Functional programming is a programming paradigm that emphasizes immutability and pure functions. It not only makes code easier ...Show More

What You'll Learn

Familiarity with the concepts of functional programming

Working knowledge of functional JavaScript

An understanding of TypeScript’s type system

The ability to build your own projects using TypeScript

Hands-on experience with the fp-ts library

Familiarity with the concepts of functional programming

Course Content

Introduction to Functional Programming

8 Lessons

Get familiar with functional programming's concepts, benefits in JavaScript, and TypeScript enhancements.

Before We Dive Deeper

Why Functional Programming?

Why JavaScript?

Why TypeScript?

Functional Programming with TypeScript

Coding Challenge: Rewriting Function with Better Types

Solution Review: Rewriting Function with Better Types

Quiz on Types

Tidbits: Some Useful JavaScript and TypeScript

11 Lessons

Unpack the core of essential JavaScript/TypeScript fundamentals for functional programming and practical coding challenges.

Setting Up TypeScript

Creating Functions in JavaScript

Backticks for Easy Printing

The Ternary Operator

Discriminating Unions

Summary: JavaScript and TypeScript Tidbits

Coding Challenge: Create Algebraic Data Type

Solution Review: Create Algebraic Data Type

Coding Challenge: Rewriting Code as an Expression

Solution Review: Rewriting Code as an Expression

Quiz: Tidbits of JavaScript and TypeScript

First Steps with Functional Programming

15 Lessons

Examine fundamental aspects of functional programming and practical applications using higher-order functions, currying, composition, and monads.

Introduction to Functional Programming

Writing Functional Code

Writing Functional Programs

Currying

Combining Currying and Composition

Problems with Currying and Composition

Monads

Advantages of Monads

Briefly about Types

Summary: First Steps with Functional Programming

Coding Challenge: Higher-Order Function

Solution Review: Higher-Order Function

Coding Challenge: Using Option in Function

Solution Review: Using Option in Function

Quiz: First Steps with Functional Programming

Our First Project: User Registration

12 Lessons

Grasp the fundamentals of user registration with fp-ts, focusing on robust type definitions, validations, and adaptable code structure.

Defining Our Types

Validation with Either

Before We Continue: Either or Validation?

Creating our User with Lifting

Bringing it Together

Cope with Changing Business Requirements

Summary: User Registration Project

Coding Challenge: Adding a Check

Solution Review: Adding a Check

Coding Challenge: Working with Either and Pipe

Solution Review: Working with Either and Pipe

Quiz: User Registration Project

Deploying a Monitoring Application

15 Lessons

Take a closer look at deploying and monitoring applications using functional programming in TypeScript.

AWS Lambda and SAM

Setting Up Our Project

Using the Cloudwatch SDK

Monads for Asynchronous Behavior

Transforming Our Data

Synchronous Behavior and IO

Bringing it All Together

Extensions

A Small Aside: Memoization

Summary: Deploying a Monitoring Application

Coding Challenge: Working with Flow

Solution Review: Working with Flow

Coding Challenge: Working with TaskEither

Solution Review: Working with TaskEither

Quiz: Deploying a Monitoring Application

Testing

8 Lessons

Tackle different testing methodologies, TDD, and functional programming testing practices in TypeScript.

The Types of Testing

Test-Driven Development

FP and Testing

Property-based Testing

Summary: Testing

Coding Challenge: Writing a Parameterized Test

Solution Review: Writing a Parameterized Test

Quiz: Testing

Once More unto the Breach: Our Final Application

11 Lessons

Master the steps to build and deploy hotel reservations using TypeScript, Lambdas, and DynamoDB.

Setting Up the Environment of Our Final Application

Writing Our First Create Lambda Code

Core Logic of the Create Lambda

Bringing it Together

Creating the Retrieve Lambda

DynamoDB

Adding the Real Database

Summary: Final Application

Coding Challenge: Using Sequence in Function

Solution Review: Using Sequence in Function

Quiz: Testing

Expanding our Reservation Application

10 Lessons

Get familiar with enhancing the reservation app using Reader, State monads, and improved configs.

Using the Reader Monad to Gather Config

Using State

Better Error Types

Restaurants and sequenceS

Choosing Configs

Exploring Some More Ideas

Summary: Expanding our Reservation Application

Coding Challenge: Using Reader Monad in Function

Solution Review: Using Reader Monad in Function

Quiz Yourself about Reservation Application

Rewriting an Application

11 Lessons

Walk through rewriting an application using functional programming principles for better maintainability.

The Original Application

Evaluations

Improvements Overview

Our New Code Setup

Validation

Dealing with the Asynchronous Calls

Advantages of Our Functional Approach

Summary: Rewriting an Application

Coding Challenge: Writing Function Using Switch

Solution Review: Writing Function Using Switch

Quiz Yourself on the Application

10.

Advanced FP Techniques

8 Lessons

Master the steps to advanced FP techniques, including DSLs, tagless final, and free monads.

Domain-Specific Language

Tagless Final

Free Monads

Executable and Declarative Encoding and Algebraic Design

Summary: Advanced FP Techniques

Coding Challenge: Create a Mini DSL

Solution Review: Create a Mini DSL

Quiz Yourself on Advanced FP Techniques

11.

Conclusion

1 Lessons

Enhance your skills in applying TypeScript and fp-ts for functional programming, and future explorations.

Closing Thoughts

12.

Appendix

1 Lessons

Solve problems in functional programming with advanced monads like Writer and These.

Additional Concepts

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