Object Scope and Self
Learn about the scope of an object, the scope of an instance method, and the self keyword.
Remember that when Ruby finds a method call, it deviates from the normal control flow which goes from top to bottom. Instead, it jumps into the method body.
We also learned that this method body has its own scope, like a shiny new room where local variables from other scopes are invisible. Instead, it has its own local variables, some of which might be defined through the method’s arguments.
We also learned that all instance variables inside an object and all its other methods are also visible.
Later, we’ll look at that mysterious top-level object that Ruby enters when it starts executing a program.
We’re now finally ready to put all these things together and introduce a new keyword: self.
The object scope
In Ruby, ...