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apl: compose f∘g (+9 tests, 182/182)
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giles
2026-05-06 23:03:14 +00:00
parent d570da1dea
commit 3d2bdc52b5
3 changed files with 69 additions and 2 deletions
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plans/apl-on-sx.md
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@@ -79,7 +79,7 @@ Core mapping:
- [x] Outer product `∘.f` — `1 2 3 ∘.× 1 2 3` ↦ multiplication table
- [x] Inner product `f.g` — `+.×` is matrix multiply
- [x] Commute `f⍨` — `f⍨ x` ↔ `x f x`, `x f⍨ y` ↔ `y f x`
- [ ] Compose `f∘g` — applies `g` first then `f`
- [x] Compose `f∘g` — applies `g` first then `f`
- [ ] Power `f⍣n` — apply f n times; `f⍣≡` until fixed point
- [ ] Rank `f⍤k` — apply f at sub-rank k
- [ ] At `@` — selective replace
@@ -118,6 +118,7 @@ data; format for string templating.
_Newest first._
- 2026-05-06: Phase 4 step 7 — compose f∘g (apl-compose monadic f∘g x, apl-compose-dyadic dyadic f x (g y)); 182/182 tests
- 2026-05-06: Phase 4 step 6 — commute f⍨ (apl-commute monadic dup, apl-commute-dyadic swap); 173/173 tests
- 2026-05-06: Phase 4 step 5 — inner product f.g (apl-inner); +.× matrix multiply, ∧.= equal-vectors; 163/163 tests
- 2026-05-06: Phase 4 step 4 — outer product ∘.f (apl-outer); rank-doubling result shape = a-shape++b-shape; 151/151 tests