clean code
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CLEAN CODE
SIRAR SALIH
.NET CONSULTANT
08.04.2023
In theory, it’s about...
SOLID
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In theory, it’s about...
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SOLID
ingle responsibility principle
pen/closed principle
iskov substitution principle
nterface segragation principle
ependency inversion principle
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In practice, it’s all about... RTM
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ReadabilityTestability
Maintainability
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Readable Code
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«Programming is the art of telling another human what one wants the computer to do.» - Donald Knuth
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Readable Code
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«Programming is the art of telling another human what one wants the computer to do.» - Donald Knuth
From http://www.osnews.com
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Readable Code
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«Programming is the art of telling another human what one wants the computer to do.» - Donald Knuth
From Pluralsight
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Readable Code
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«Programming is the art of telling another human what one wants the computer to do.» - Donald Knuth
• Readable code is understandable code• Naming
Class names Context specific
Method names Say exactly what they do
• The don’ts Don’t confuse Don’t hide Don’t joke Don’t be informal
• Tell a story!
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Readable Code
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«Programming is the art of telling another human what one wants the computer to do.» - Donald Knuth
Bad
Better
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Testable Code
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• Making it testable, is making it clean• Isolation• Decoupling• Separation of concerns• TDD• Design• Clean is the side effect of testable
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Testable Code
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«You know you should be unit testing, so why aren’t you doing it?» - Roy Osherove
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Testable Code
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Bad Good
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Maintainable Code
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Maintainable Code
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• Easy to extend• A change requires one change, not ten• Easy to understand• Unbrittle• Test coverage• Spreads optimism• Importance level: Readable > maintainable
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Bad Code
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Good Code
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The Evil Cycle
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From http://blog.codeclimate.com/
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Be an Agent of Change
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Fight Code Smells and Anti-Patterns
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• Comments• Duplication• Global objects• Magic numbers• Circular dependency• Coupling• Nesting• Dead code
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Make it Routine
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Recommended Books
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Thank you / Questions
Blog: http://sirars.com/ • sirar.salih@itera.no / sirars@gmail.com• @SirarSalih
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