Web Reference: Fairly straightforward, methods that are available on classes are called class methods, and methods that are available on instances are called instance methods. Instance variables are hidden away inside the object. They’re notterribly hidden, you see them whenever you inspect the object, and thereare other ways of accessing them, but Ruby uses the good object-orientedapproach of keeping data sort-of hidden away. So what methods do exist for Greeter objects? Whoa. That’s a lot of methods. We only defined tw... From outside the object, instance variables cannot be altered or even observed (i.e., ruby's instance variables are never public) except by whatever methods are explicitly provided by the programmer.
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