There are advanced ways to access instance variables like instance variable get but you should avoid these.
Ruby instance variable in module.
Remember how instance variables work in ruby.
Instance variables begin with commat.
Modules with instance variables could be considered harmful background.
Consider the following module.
To embed a module in a class you use the include statement in the class syntax include modulename if a module is defined in a separate file then it is required to include that file using require statement before embedding module in a class.
Btw you can get a list of instance variables.
I e it is not possible to create objects from a module.
The scope of a local variable ranges from class module def or do to the corresponding end or from a block s opening brace to its close brace.
However modules can not be instantiated.
For example using instance variables in the controllers helpers and views.
All methods of a class use the same instance variable table as opposed to local variables where each method will have a different variable table.
The constant variables can not reassign their values.
For a mixin this means that the module that you mix into your client class the mixee may create instance variables in the client object and may use attr and friends to define accessors for.
It now makes sense to introduce another language feature in ruby.
Instance variables can be referenced in any method of that class.
The first mention of an prefixed variable creates the instance variable in the current object self.
You can embed a module in a class.
They are things that hold methods just like classes do.
In ruby modules are somewhat similar to classes.
Instance variables don t have to be created in the initialize method but that s how you give them an initial value.
Ruby s default implementation is to add the constants methods and module variables of this module to mod if this module has not already been added to mod or one of its ancestors.
When this module is included in another ruby calls append features in this module passing it the receiving module in mod.
Constant variables start with the upper case letter.
Uninitialized instance variables have the value nil and produce warnings with the w option.
Instance variables live within a class instance so as long as that instance stays alive so will the instance variables.
Instance variables in views.
