Attention to the Role Played by a Method
Is the method a command or a question?
Generally speaking, methods play one of two roles:
- They answer a question.
- They perform a command.
Examples of methods that are questions
If we have a user object, and users have a name, we’d ask the user object for its name by calling the name method. The user.name method returns the user’s name. Arrays know their size (the number of elements they have), so we can ask an array: [1, 2, 3].size returns 3.
Another example is the sort ...