Keeping Ruby Reasonable
summary
Ruby’s binding returns a first-class environment and Ruby chooses to expose all bindings as live and mutable, which lets any proc’s binding be used to rewrite methods or keep large objects alive; that makes programs impossible to reason about and prevents common VM optimizations. Scheme’s R6RS opts for controlled library references and eval-with-limited-environment; Objective‑C captures variables as readonly or explicit mutables; Ruby’s method.to_proc yields a far more restricted environment as shown by the capture‑the‑flag examples. The concrete takeaway: formalize and restrict environments so eval, GC and optimizations become reliable.
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chapters (20)
- 0:00Introduction
- 2:24The Story
- 3:29The Error
- 5:29What does it mean
- 7:05Definitions
- 9:36Source
- 11:20Four Essential Questions
- 16:23R6 RS Conclusion
- 17:55ObjectiveC
- 21:12Is this reasonable
- 23:44Blue Team
- 24:22Red Team
- 25:26Spy
- 27:36Conclusion
- 34:08FirstClass Environment
- 36:38Ruby Compilers
- 38:38Scheme
- 40:08Constant Resolution
- 42:08Bugs
- 44:08Reasoning
