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Ruby Midwest 2011 - Keynote: Architecture the Lost Years by Robert Martin
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Robert C. Martin's Ruby Midwest 2011 keynote argues that software architecture should express the application's intent rather than its framework. He covers separating entities, interactors and boundaries so the web, database and framework are details.
Frequently recommended as an influential talk on decoupled, testable architecture, though some commenters push back on Martin's TDD advocacy.
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