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apache jsp

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apache jsp apache jsp By default, the message, which can be sent to any object, dumps out the object's id and instance variables. It looks as though we have them set up correctly. Our experience tells us that during development we'll be printing out the contents of a 's default formatting leaves something to be desired. Fortunately, Ruby has a standard message, , which it sends to any object it wants to render as a string. Let's try it on our song.

apache jsp That wasn't too useful---it just reported the object id. So, let's override in our class. As we do this, we should also take a moment to talk about how we're showing the class definitions in this book. In Ruby, classes are never closed: you can always add methods to an existing class. This applies to the classes you write as well as the standard, built-in classes.

apache jsp All you have to do is open up a class definition for an existing class, and the new contents you specify will be added to whatever's there. This is great for our purposes. As we go through this chapter, adding features to our classes, we'll show just the class definitions for the new methods; the old ones will still be there. It saves us having to repeat redundant stuff in each example. Obviously, though, if you were creating this code from scratch, you'd probably just throw all the methods into a single class definition.

apache jsp

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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apache jsp