Y Combinator Enables Idiomatic Recursive JavaScript
This essay derives the Why Bird (a JavaScript form of the Y Combinator) from the mockingbird combinator, showing how to decouple recursion and write functions that call themselves idiomatically without explicit self-passing. It then constructs a Decoupled Trampoline (Long-Tailed Widowbird) to run tail-recursive functions in constant stack space and demonstrates practical techniques such as memoization, composable decorators, and trampoline-friendly implementation patterns.
Scoring Rationale
Useful, implementable tutorial with concrete patterns; limited novelty and narrow applicability outside functional-JavaScript practitioner audiences.
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