What is functional programming in JavaScript?
Asked on Aug 09, 2024
Answer
Functional programming in JavaScript is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids changing state or mutable data. It emphasizes the use of pure functions, immutability, and higher-order functions.
// Example of a pure function
const add = (a, b) => a + b;
// Higher-order function: takes a function as an argument
const applyOperation = (operation, x, y) => operation(x, y);
// Using the higher-order function
const result = applyOperation(add, 5, 3);
console.log(result); // Output: 8Additional Comment:
✅ Answered with JavaScript best practices.- A "pure function" is a function where the output value is determined only by its input values, without observable side effects.
- "Higher-order functions" are functions that take other functions as arguments or return them as results.
- Functional programming promotes "immutability", meaning data should not be changed after it is created.
- This paradigm can lead to more predictable and easier-to-test code.
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