Alexandre Bertails

@alex.bertails.org

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UDA (Unified Data Architecture) and Upper domain modeling language at Netflix. Former , W3C/MIT. RDF expert who prefers Scala over Java. One Piece nerd.

Book cover of Structure and Interpretation of Computer Programs, by Harold Abelson, Gerald Jay Sussman, Julie Sussman.

Screenshot of `git diff --stat` in GitHub UI showing +166 -12,192

The familiar Open/Closed Principle states that software - in the face of new requirements - should ideally only require extension, not modification. Code written in what we called the functional way (or with the visitor pattern) enables openness for new operations, whereas the object-oriented way enables openness for new alternatives.