Essential Books

Modules

suggest change

Syntax 

module Name;

    any ruby expressions;

end

Remarks

Module names in Ruby are constants, so they have to start with a capital letter. 

module foo; end # Syntax error: class/module name must be CONSTANT
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Modules:
* Modules
* A simple mixin with include
* Modules and Class Composition
* Module as Namespace
* A simple mixin with extend
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