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---
title: Introduction
description: A toolset of small support modules used throughout the @dry-rb & @rom-rb ecosystems
layout: gem-single
order: 5
type: gem
name: dry-core
sections:
- cache
- constants
- classes
- deprecations
- extensions
---
`dry-core` is a simple toolset that can be used in many places.
## Features
- [Cache](docs::cache) - allows you to cache call results that are solely determined by arguments.
- [Class Attributes](docs::classes/class-attributes)
- [Class Builder](docs::classes/class-builder)
- [Constants](docs::constants) - a list of constants you can use to avoid memory allocations or identity checks.
- [Deprecations](docs::deprecations)
- [Extensions](docs::extensions)
|
