August 2018
Intermediate to advanced
332 pages
9h 12m
English
Content preview from Clean Code in Python
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DRY/OAOO
The ideas of Don't Repeat Yourself (DRY) and Once and Only Once (OAOO) are closely related, so they were included together here. They are self-explanatory, you should avoid duplication at all costs.
Things in the code, knowledge, have to be defined only once and in a single place. When you have to make a change in the code, there should be only one rightful location to modify. Failure to do so is a sign of a poorly designed system.
Code duplication is a problem that directly impacts maintainability. It is very undesirable to have code duplication because of its many negative consequences:
- It's error prone: When some logic is repeated multiple times throughout the code, and this needs to change, it means we depend on efficiently ...
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