Practical Data Transformations
Everyday data transformations using functional patterns - arrays, objects, grouping, aggregation, and null-safe access
fp-ts Do Notation
Master Do notation in fp-ts to write readable, sequential functional code without callback hell. Covers bind, apS, let, bindTo and real-world patterns.
Practical Error Handling with fp-ts
Stop throwing everywhere - handle errors as values using Either and TaskEither for cleaner, more predictable code
Functional Programming Fundamentals
Core FP concepts including pure functions, currying, composition, and pointfree style - the foundation for mastering functional TypeScript
fp-immutable
Practical immutability patterns in TypeScript - spread operators, nested updates, readonly types, and when mutation is actually fine
fp-ts Option and Either
Functional error handling and nullable value management using fp-ts Option and Either types
fp-ts Pipe and Flow Composition
Master function composition in fp-ts using pipe and flow for building elegant, type-safe data transformation pipelines
Pragmatic Functional Programming
A practical, jargon-free guide to functional programming - the 80/20 approach that gets results without the academic overhead
Functional Programming in React
Practical patterns for using fp-ts with React - hooks, state, forms, data fetching. Works with React 18/19, Next.js 14/15.
fp-refactor
Comprehensive guide for refactoring imperative TypeScript code to fp-ts functional patterns
Managing Side Effects Functionally
Master functional approaches to side effects including IO types, effect isolation, idempotent operations, and quarantining impure code - essential patterns for reliable TypeScript applications
fp-ts-task-either
Functional async patterns using TaskEither for type-safe error handling in TypeScript
fp-ts-validation
Validation patterns using fp-ts with error accumulation, form validation, and API input validation
fp-either-ref
Quick reference for Either type. Use when user needs error handling, validation, or operations that can fail with typed errors.
fp-option-ref
Quick reference for Option type. Use when user needs to handle nullable values, optional data, or wants to avoid null checks.
fp-pipe-ref
Quick reference for pipe and flow. Use when user needs to chain functions, compose operations, or build data pipelines in fp-ts.
fp-taskeither-ref
Quick reference for TaskEither. Use when user needs async error handling, API calls, or Promise-based operations that can fail.
fp-types-ref
Quick reference for fp-ts types. Use when user asks which type to use, needs Option/Either/Task decision help, or wants fp-ts imports.
fp-ts Algebraic Data Types and Type Classes
Product types, sum types, semigroups, monoids, Eq, Ord, and building custom type class instances for domain modeling in TypeScript
fp-ts-async-practical
Practical async patterns using TaskEither - clean pipelines instead of try/catch hell, with real API examples
fp-ts-backend
Functional programming patterns for Node.js/Deno backend development using fp-ts, ReaderTaskEither, and functional dependency injection
Function Composition - Building from Small Pieces
Practical patterns for composing functions in TypeScript using pipe, flow, and functional design principles