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What is namespace in Ruby?
A namespace is a container for multiple items which includes classes, constants, other modules, and more. The namespace in Ruby is defined by prefixing the keyword module in front of the namespace name. The name of namespaces and classes always start from a capital letter.
How does Ruby require work?
The require method takes the name of the file to require, as a string, as a single argument. This can either be a path to the file, such as ./lib/some_library. rb or a shortened name, such as some_library. If the argument is a path and complete filename, the require method will look there for the file.
How does include work in Ruby?
How does an Include Statement Works in Ruby?
- When we write in Ruby, the compiler looks for the module name which we are including inside the class and include all the methods of the module inside the class.
- Once we have included the module all the methods can be directly accessed with a class name.
How are mixins used in a class in Ruby?
Mixins in Ruby allows modules to access instance methods of another one using include method. Mixins provides a controlled way of adding functionality to classes. The code in the mixin starts to interact with code in the class. In Ruby, a code wrapped up in a module is called mixins that a class can include or extend. A class consist many mixins.
How are mixins used to add functionality to a class?
Mixins give you a wonderfully controlled way of adding functionality to classes. However, their true power comes out when the code in the mixin starts to interact with code in the class that uses it. Let us examine the following sample code to gain an understand of mixin −
How does the require statement work in Ruby?
Like class methods, whenever you define a method in a module, you specify the module name followed by a dot and then the method name. The require statement is similar to the include statement of C and C++ and the import statement of Java.
Why do you need a module in Ruby?
Modules are one of the shiniest resources of Ruby because they provide two great benefits: we can create namespaces to prevent name clashes and we can use them as mixins to share code across the application. In structural terms, a module is pretty similar to any Ruby class.