An educational pure functional programming library in TypeScript
Release v0.1.0-alpha.8
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CHANGELOG.md
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CHANGELOG.md
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All notable changes to this project will be documented in this file.
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## [0.1.0-alpha.8] - 2026-02-07
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### Added
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- **Docs site** — Astro Starlight documentation site with tutorials, concepts, stories, and examples
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- **Nullability guards** — `isDefined`, `isNotNull`, `isNotNullish` for piping and filtering
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- **`hasProperties` guard** — Multi-property object checking: `hasProperties("id", "name", "email")(data)`
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- **Recursion over loops concept article** — Why pure functional code avoids loops and how to replace them with expressions
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### Changed
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- **TS 5.5+ inferred type predicates** — Removed redundant `: x is T` annotations from simple guards where TypeScript infers them automatically
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- **Stricter tsconfig** — Added `exactOptionalPropertyTypes` and `noPropertyAccessFromIndexSignature`
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- Replaced all `forEach`/imperative loops in docs and examples with `map`+`join`, `reduce`, and `test.each`
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- Replaced `switch` statements with `match()` in story examples
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- Replaced manual null/undefined checks with library guards (`isDefined`, `isObject`, `hasProperties`) in docs and examples
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## [0.1.0-alpha.7] - 2026-02-07
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### Added