immutability

The Functional toolkit for Kotlin HTTP applications. http4k provides a simple and uniform way to serve, consume, and test HTTP services.

Pattern Matching for Javascript

ESLint rules to disable mutation and promote fp in JavaScript and TypeScript.

Efficient immutable updates, 10x faster than Immer by default, even faster than naive handcrafted reducer.

A MobX powered state management solution based on data trees with first class support for Typescript, support for snapshots, patches and much more

TSLint rules to disable mutation in TypeScript.

State management for React

Don't Fear the Profunctor Optics!

Docile keeps your Ruby DSLs tame and well-behaved

Functional programming, immutable collections and FP constructs for typescript and javascript

A very fast and lightweight Typescript library to create immutable states with a mutable syntax

⚡️ λ PHP functional library focused on simplicity and performance

Generic, Null-safe, Immutable Collections and Functional Transformations for the JVM

The Chaos Programming Language

Immutable Package Manager

ABRoot is utility which provides full immutability and atomicity to a Linux system, by transacting between two root filesystems. Updates are performed using OCI images, to ensure that the system is always in a consistent state.

Predictable state container for React apps written using Hooks

A tiny immutable store with type safety.

A predictable & observable state container for React apps

An immutability helper for Go