What You'll Learn
Function composition is the process of combining two or more functions to create a new function. It's one of the most powerful patterns in functional programming, allowing you to build complex operations from simple, reusable building blocks.
Learning Objectives
- Understand function composition and why it matters
- Implement compose and pipe utilities
- Build data transformation pipelines
- Use point-free style programming
- Compose async functions
- Apply composition in real-world scenarios
Duration: 5-7 minutes
Level: Intermediate to Advanced
Prerequisites: Strong JavaScript fundamentals, understanding of higher-order functions, arrow functions
Why Learn Function Composition?
Function composition helps you:
- Write cleaner code - Break complex logic into simple, testable functions
- Improve reusability - Small functions can be combined in different ways
- Enhance readability - Pipelines read like a series of transformations
- Reduce bugs - Pure functions are easier to test and debug
- Think declaratively - Focus on what to do, not how to do it
What You'll Build
In this tutorial, you'll implement:
- compose and pipe utility functions
- Data transformation pipelines
- Point-free style functions
- Async composition utilities
- Real-world examples: data processing, validation, API transformations
Tutorial Structure
This tutorial covers:
- Composition Basics - Combining functions right-to-left
- Pipe - Combining functions left-to-right
- Point-Free Style - Writing functions without mentioning arguments
- Currying for Composition - Making functions composable
- Async Composition - Composing promises and async functions
- Real-World Patterns - Data pipelines, validation chains, transformations