remeda

Remeda

The first "data-first" and "data-last" utility library designed especially for TypeScript.

Documentation

Read the full docs and API reference on remedajs.com/docs.

Migrating from other libraries? Check out our migration guides for Lodash and Ramda!

Interested in contributing? Read the contributing guide.

Features

• First-class TypeScript support, with types that are as specific as possible.
• Supports data-first (R.filter(array, fn)) and data-last (R.filter(fn)(array)) approaches.
• Lazy evaluation support with pipe and piped.
• Runtime and types are both extensively tested, with full code coverage.
• Tree-shakable, supports CJS and ESM.
• Fully documented with JSDoc, supports in-editor function documentation.

Getting started

Installation

npm install remeda
pnpm add remeda
yarn add remeda
bun install remeda
deno add jsr:@remeda/remeda

Usage

// Import everything:
import * as R from "remeda";

// Or import methods individually:
// import { pipe, tap, unique, take } from "remeda";

R.pipe(
  [1, 2, 2, 3, 3, 4, 5, 6],
  R.tap((value) => console.log(`Got ${value}`)),
  R.unique(),
  R.take(3),
); // => [1, 2, 3]

// Console output:
// Got 1
// Got 2
// Got 2
// Got 3

Getting help

Questions, bug reports, and feature requests are tracked in GitHub issues.

Contributors

Made with contrib.rocks.

Similar packages

Other packages similar to remeda

lodash

Lodash is a popular utility library that provides a wide range of functions for working with arrays, objects, and other data types. While Lodash is more widely used and has a larger community, Remeda offers a more modern and functional approach with better TypeScript support.

ramda

Ramda is a functional programming library for JavaScript that emphasizes immutability and function composition. Like Remeda, Ramda provides a collection of functions for working with data in a functional style. However, Remeda is designed to be more type-safe and user-friendly for TypeScript users.

fp-ts

fp-ts is a library for functional programming in TypeScript. It provides a comprehensive set of tools for working with functional programming concepts, such as monads and functors. While fp-ts is more powerful and flexible, it has a steeper learning curve compared to Remeda.