ST 4U 323: More on Polymorphism
Today's Smalltalk 4 You goesback to Polymorphism in Smalltalk for some more discussion. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:
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We've gone over a basic polymorphism example, but one point needs to be made: when you decide to add polymorphic behavior to your own objects, the API you need to cover is typically small. What if you need to cover a system class - like, say, Collection?
In the simple example we covered here, there was one method to create in each object: #currentValue. If you intend to cover something larger, you'll have more work to do.
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Tags: smalltalk, polymorphism
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