seniorRuby

How does Ruby constant resolution interact with lexical scope and inheritance?

Updated May 17, 2026

Short answer

Ruby resolves constants using lexical scope first, then inheritance chain, then Object namespace.

Deep explanation

Constant lookup is not purely OOP-based. It starts from lexical nesting (where code is written), then checks enclosing modules/classes, then superclass chain, and finally global Object space. This hybrid resolution model enables modular namespace control but introduces complexity in large codebases.

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