July 2019
Intermediate to advanced
410 pages
10h 32m
English
Content preview from Hands-On Design Patterns with C# and .NET Core
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DRY – Don't Repeat Yourself
The guiding thought behind the Don't Repeat Yourself (DRY) principle is that duplication is a waste of time and effort. The repetition could take the form of processes and code. Handling the same requirement multiple times is a waste of effort and creates confusion within a solution. When first viewing this principle, it might not be clear how a system could end up duplicating a process or code. For example, once someone has determined how to do a requirement, why would someone else take the effort to duplicate the same functionality? There are many circumstances in which this happens in software development, and understanding why this happens is key to understanding the value of this principle.
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