On State
summary
Shows a mechanical adder and multiplier and a Castell slide rule that work as analog devices, demonstrates a voltmeter-as-computer and explains delay lines and SR flip‑flops, claims digital machines are analog plus set‑theory bookkeeping and that state creates a high‑dimensional complex systems problem. Proposes constrained mutability: one-event-per-global with poll‑based writes, non‑rebindable globals and scoped mutable locals, scoped collection access that blacklists aliases, and argues these rules make global state tractable rather than banishing mutation.
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chapters (23)
- 0:00Introduction
- 1:20History Philosophy
- 1:50Computers
- 3:41Mechanical Adder
- 7:52Analog Computers
- 9:17Delay Lines
- 12:16Causation
- 14:40Blofeld
- 15:00Jaws
- 17:21Complex Systems
- 18:11Math
- 18:45Digital Arithmetic
- 20:28Addition
- 23:05Continuous Math
- 23:44Discrete Math
- 25:04Analog Computer
- 25:59Digital Computer
- 29:23Practical Issues
- 30:10Modularity
- 30:55Eventdriven
- 32:02Mutable locals
- 32:49Collections
- 33:25Conclusion
