![]() Mapping between a sequence of numbers and the items I want to represent. What a computer scientist means by encode is to define a ByĮncode, we do not mean what some people think, which is to encrypt or translate This implementation is that it would not be easy to compare cards to see whichĪn alternative is to use integers to encode the ranks and suits. Words like "Spade" for suits and "Queen" for ranks. One possibility is to use strings containing What the attributes should be: rank and suit. If we want to define a new object to represent a playing card, it is obvious Depending on the game that you are playing, the rank ofĪce may be higher than King or lower than 2. The suits are Spades, Hearts, Diamonds, and Clubs (inĭescending order in bridge). There areįifty-two cards in a deck, each of which belongs to one of four suits and one Get a deck, or else this chapter might not make much sense. If you are not familiar with common playing cards, now would be a good time to In this chapter we will look at some examples of these combinations, usingĬard objects as an example. That contain lists you can create objects that contain objects and so on. You canĪlso create objects that contain lists (as attributes) you can create lists Should not be surprised to learn that you can create lists of objects. Having seen this pattern, and having learned about lists and objects, you ![]() ![]() Within a while loop, within another if statement, and so on. AnotherĮxample is the nested structure of statements you can put an if statement One of the firstĮxamples was using a method invocation as part of an expression. Composition ¶īy now, you have seen several examples of composition. In this chapter we look at a larger example using object oriented programmingĪnd learn about the very useful OOP feature of inheritance. ![]()
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