Eloquent Ruby (Addison-Wesley Professional Ruby Series)

In the next section, we’ll put together several of the pieces we’ve looked at more or less separately: method calls (message sending), objects and their status as instances of classes, and the mixing of modules into classes. All these concepts come together in the process by which an object, upon being sent a message, looks for and finds (or fails

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Ruby sees all data structures and values—from simple scalar (atomic) values like integers and strings, to complex data structures like arrays—as objects. Every object is capable of understanding a certain set of messages. Each message that an object understands corresponds directly to a method—a named, executable routine whose execution the object

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