Metaprogramming in Ruby: Beginner Level

Ruby on Rails is an open source full-stack web application framework for the Ruby programming...

Expanding upon this idea, anyone building a framework will likely find metaprogramming helpful (or even essential). Rails is one such framework built using the metaprogramming capabilities provided by Ruby. This can be illustrated by the Rails enum implementation; when you define an enum, the framework provides a variety of helpers out-of-the-box:.

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A domain-specific language (DSL) has its own classes and methods that obfuscate the underlying language they’re built with, reducing complexity and focusing on providing tools to accomplish specific tasks. Gradle is a good example of such a use-case; it takes advantage of Groovy metaprogramming to deliver a product focused solely on build automation.