Sandi Metz

Sandi Metz
Nationality	American
Occupations	Software engineer author
Employer	Duke University
Website	sandimetz.com

Sandi Metz is an American software engineer and author. She is the author of Practical Object-Oriented Design in Ruby . ^[1] Metz teaches workshops around the country for new and experienced developers, emphasizing good programming habits and practices.

Metz is known for her books and articles on object-oriented programming and her statement regarding abstraction and the Don't repeat yourself principle, that duplication is cheaper than the wrong abstraction. ^{[2] [3]}

Publications

• Metz, Sandi (September 5, 2012), Practical Object-Oriented Design in Ruby (First ed.), Addison-Wesley, ISBN   0-321-72133-0
• Metz, Sandi & Owen, Katrina (Mar 20, 2017), 99 Bottles of OOP (First ed.), Potato Canyon Software, LLC, ISBN   1-944823-00-X

Important concepts elaborated

• SOLID Design principles ^[4]
• Test-driven development ^[5]
• Dependency injection ^[6]

References

1. “Object-Oriented Design in Ruby”
2. "Introducing and Scaling a GraphQL BFF". InfoQ. Retrieved October 29, 2022.
3. Morris, Kief (2025). Infrastructure as Code: Designing and Delivering Dynamic Systems for the Cloud Age (Third ed.). Sebastopol, CA: O'Reilly. ISBN   978-1-0981-5031-0.
4. “Solid Object Oriented Design - GORUCO 2009”
5. "The Magic Tricks of Testing - Rails Conf 2013"
6. "Practical Object-Oriented Design in Ruby: Managing Dependencies"

External links

• Official website
• RubyConf 2017 Keynote Speech
• Ruby Rogues Interview