Functional Programming Tutorial

Functional programming is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data. It emphasizes the use of pure functions and immutable data.

Key Concepts

Pure Functions: Functions that always return the same output for the same input and have no side effects.
Immutability: Data that cannot be changed after it is created.
Higher-Order Functions: Functions that operate on other functions.

Benefits of Functional Programming

Improved Code Quality: Pure functions are easier to test and reason about.
Increased Performance: Immutability can lead to better performance due to caching and memoization.
Concurrency: Functional programming makes it easier to write concurrent code.

Getting Started

To learn more about functional programming, you can read our Introduction to Functional Programming.

Examples

Here are some examples of functional programming in action:

Filtering a List:
```
filter even [1, 2, 3, 4, 5]
```
This will return [2, 4].

Mapping a Function:

const numbers = [1, 2, 3, 4, 5];
const doubledNumbers = numbers.map(n => n * 2);

This will return [2, 4, 6, 8, 10].

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