Namespaces is a container for multiple instances which includes classes, constants and other modules. It is ensured in a namespace that all objects have unique names for their identification. It is a way of bundling logically related objects together. Modules serve as a convenient tool for this. This allows for classes or modules with conflicting names to co-exist. It is ensured in a namespace that all the objects have unique names for easy identification. Generally, they are structured in a hierarchical format so, that names can be reused.
- Namespace in Ruby allows multiple structures to be written using hierarchical manner. Thus, one can reuse the names within the single main namespace.
- The namespace in Ruby is defined by prefixing the keyword module in front of namespace name.
- The name of namespace and classes always start from a capital letter.
- We can access the sub members of double with the help of :: operator. It is also called the constant resolution operator.
- Ruby allows nested namespace.
- We can use include keyword to copy the other module's objects into the existing namespace without qualifying their name.
module Namespace_name
# modules.. and classes..
end
Example 1:
This is an example of the simple formation of the namespace with a class and then executing to class methods defined within the class. Here, we access the sub members within the namespace, the "::" operator is used. It is also called the constant resolution operator.
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