Ruby Modules
Ruby modules are a fundamental language feature that provide a way to group methods, constants, and classes into reusable namespaces. They serve two primary purposes: as mixins to add functionality to classes without inheritance, and as namespaces to prevent naming conflicts. Modules cannot be instantiated like classes, but they enable code organization and sharing across different parts of a Ruby application.
Developers should learn Ruby modules to implement mixins for code reuse and to avoid deep inheritance hierarchies, which is common in object-oriented Ruby programming. They are essential for creating reusable libraries, organizing code into logical namespaces, and implementing interfaces or shared behaviors across unrelated classes, such as in Rails concerns or utility modules.