metaprogramming - Oxycon Blog

Demystifying and writing own DSL in Ruby by examples - a practical guide

Demystifying and writing own DSL in Ruby by examples - a practical guide

Ruby DSLs demystified by building three of them: a Minitest-like test framework, a Rails-style routes definition, and an RSpec-like spec syntax. See how blocks, instance_eval, and Ruby metaprogramming turn plain classes into a friendly mini-language.

Dec 18, 2023

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class_eval, instance_eval and instance_exec in Ruby

class_eval, instance_eval and instance_exec in Ruby

class_eval, instance_eval, and instance_exec power Ruby metaprogramming: reopening classes, running blocks inside an object, and passing arguments in. All explained through one MyWebServer class with a configure DSL, ending in a reusable AppConfig settings pattern.

Aug 14, 2023

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