If you think undefined methods are likely to be a problem, you can take avoid-ance measures by testing if a singleton method exists before trying to use it.
If you think undefined methods are likely to be a problem, you can take avoid-ance measures by testing if a singleton method exists before trying to use it.
you might have noticed that the singleton class seems to be doing something rather similar to a singleton method.
A singleton method is a method which belongs to a single object. A singleton class, on the other hand, is a class which defines a single object. Confused? Me too.
The whole point of a private method is that it cannot be called from outside the scope of the object to which it belongs. So this won’t work
In some cases, you may want to restrict the ‘visibility’ of your methods to ensure that they cannot be called by code outside the class in which the methods occur.
There are times when you may want to redefine a method that already exists in some class.
The method responsible for bringing an object into being is called the construc-tor. In Ruby, the constructor method is called new.
When you run a method that encloses nested methods, those nested methods will be brought into scope outside that method
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