课程: Treating Go as an Object-Oriented Language

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Leveraging composition

Leveraging composition - Go教程

课程: Treating Go as an Object-Oriented Language

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Leveraging composition

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- [Instructor] So, now I want to show you how to leverage composition. In your pets package, let's create a new file called animal. We will create a type animal that is a struct, and we will put a hidden field, so an encapsulated field called lastAte with a time. So, now, let's put a function on our animal. And this is going to look very familiar. We're going to call it feed, and we will pass it food as a string, return a string. We will set a dot last ate equal to time dot now. So, when we're feeding him, we're going to say that he just ate and we will return format dot sprint f. The animal is eating percent s, and we will pass it the food. Now, let's add another method called, is hungry, and this will return a bool and we will simply return time dot now, let me make this an actual bool here, time dot now dot sub, and let's see. My dog eats all the time, no matter how often he ate. So, we will do, what, two seconds, how…

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