Two fundamental abstractions
summary
Argues that two primitives — a no-arg getter and a single-arg setter — compose into useful abstractions: implements getter getters to create lazy ranges (10..15 yields six values) and uses Symbol.iterator / Symbol.iterator + next to make those ranges iterable without allocating arrays, then composes filter and concat operators. Implements setter-based callbacks as subscribable streams (Observable-like) using plain JavaScript and addEventListener examples; demos run live and the tiny prototypes work.
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chapters (5)
- 0:00Start
- 2:35Fundamental Abstractions the Getter and the Setter
- 12:52Lazy Initialization
- 14:11For Loop
- 19:11Anti-Pattern
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