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5 Cards in this Set
- Front
- Back
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Display |
It should not display something to the output as well as return a value. |
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Only do one thing |
Decide whether the method should return something with no side effects or only perform side effects with no return. If you do both, it's likely that you won't remember what it does when you need to use the method. The method name should reflect whether it has side effects or not (for example, many methods in the standard Ruby library end with a ! to signify side effects). |
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naming conventions |
In Ruby, we would not say return_total, it would be just total - returning a value is implied. Further, we would not expect a totalmethod to have side effects or print a value out. We would expect a method called total to be defined something like this: |
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method abstraction |
make sure that all methods are on the same level of abstraction. this will prevent confusion and make it easy to understand your code |
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methods and mutation |
When we see a method called update_total, we assume that the parameter passed in to it will be mutated. Therefore, we wouldn't expect to use this method like this: total = update_total(total, cards). |
