Concise ways to handle immutable data

Introduction

Data classes, sealed hierarchies, and above all, immutable data is

Lenses

Lenses are the most common type of optic you work with. This section discusses

Optionals

Optionals allow focusing on elements that may not be present. This includes

Traversals

The framework laid out by optics extends very nicely to values like lists, which

Prisms & Isos

Prisms extend the capabilities of optics from merely inspecting or modifying

Reflection

Although we strongly recommend generating optics using the DSL and @optics attribute, sometimes this is impossible. We provide the small utility package arrow-optics-reflect for those scenarios, which bridges Arrow Optics with Kotlin's reflection capabilities.