「javascriptで難読fizzbuzz」っていうお題で書き始めました。
rnという関数でChurch数をjavascriptの整数に変換していますが、これは結果の表示用であって計算は全てChurch数のまま行ってます。
実行時の効率は考えてないので、結果が表示されるまで数秒かかります。
fizzbuzz.js
const z=f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))) //Zコンビネーター
const id=x=>x //恒等関数
const sc=n=>f=>x=>f(n(f)(x)) //succ
const pr=n=>f=>x=>n(g=>h=>h(g(f)))(tr(x))(id) //pred
const mn=m=>n=>n(pr)(m) //引き算
const pl=m=>n=>n(sc)(m) //足し算
const ml=m=>n=>n(pl(m))(zr) //掛け算
const zr=f=>x=>x //0
const th=f=>x=>f(f(f(x))) //3
const fv=f=>x=>f(f(f(f(f(x))))) //5
const ft=ml(th)(fv) //15
const hd=ml(ml(fv)(fv))(sc(th)) //100
const tr=t=>f=>t //true
const fl=t=>f=>f //false
const iz=n=>n(tr(fl))(tr) //isZero
const nt=b=>b(fl)(tr) //not
const an=b=>c=>b(c(tr)(fl))(fl) //and
const or=b=>c=>nt(an(nt(b))(nt(c))) //or
const lt=z(f=>a=>b=>or(iz(a))(iz(b))(()=>nt(iz(b)))(()=>f(pr(a))(pr(b)))()) //less than
const md=z(f=>m=>n=>lt(m)(n)(()=>m)(()=>f(mn(m)(n))(n))()) //割り算のあまり
const cn=x=>y=>f=>f(x)(y) //cons
//Church数からjavascriptの整数に変換（表示用）
const rn=z(f=>n=> iz(n)(()=>0)(()=>f(pr(n))+1)())
//Church数を受け取って、fizz, buzz, javascriptの整数のいずれかを返す関数
const fb=n=>iz(md(n)(ft))("FizzBuzz")(iz(md(n)(fv))("Buzz")(iz(md(n)(th))("Fizz")(rn(n))))
//100から0までの fizzbuzz の結果のリスト（降順）
const fbs=z(f=>n=>iz(n)(()=>cn(cn(zr)(zr))(zr))(()=>cn(cn(n)(fb(n)))(f(pr(n))))())(hd)
//結果のリストを逆順に出力
const ma=z(f=>ls=>iz(ls(tr)(tr))(()=>zr)(()=>(f(ls(fl)),console.log(ls(tr)(fl))))())(fbs)
以下はワンライナーver.
fizzbuzz2.js
(f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>ls=>(n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(ls(t=>f=>t)(t=>f=>t))(()=>(f=>x=>x))(()=>(f(ls(t=>f=>f)),console.log(ls(t=>f=>t)(t=>f=>f))))())((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>n=>(n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(n)(()=>(x=>y=>f=>f(x)(y))((x=>y=>f=>f(x)(y))(f=>x=>x)(f=>x=>x))(f=>x=>x))(()=>(x=>y=>f=>f(x)(y))((x=>y=>f=>f(x)(y))(n)((n=>(n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>m=>n=>((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>a=>b=>(b=>c=>b(t=>f=>t)(c))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(a))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b))(()=>(b=>b(t=>f=>f)(t=>f=>t))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b)))(()=>f((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(a))((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(b)))()))(m)(n)(()=>m)(()=>f((m=>n=>n(n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(m))(m)(n))(n))()))(n)((m=>n=>n((m=>n=>n(n=>f=>x=>f(n(f)(x)))(m))(m))(f=>x=>x))(f=>x=>f(f(f(x))))(f=>x=>f(f(f(f(f(x))))))))("FizzBuzz")((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>m=>n=>((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>a=>b=>(b=>c=>b(t=>f=>t)(c))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(a))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b))(()=>(b=>b(t=>f=>f)(t=>f=>t))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b)))(()=>f((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(a))((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(b)))()))(m)(n)(()=>m)(()=>f((m=>n=>n(n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(m))(m)(n))(n))()))(n)(f=>x=>f(f(f(f(f(x)))))))("Buzz")((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>m=>n=>((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>a=>b=>(b=>c=>b(t=>f=>t)(c))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(a))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b))(()=>(b=>b(t=>f=>f)(t=>f=>t))((n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(b)))(()=>f((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(a))((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(b)))()))(m)(n)(()=>m)(()=>f((m=>n=>n(n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(m))(m)(n))(n))()))(n)(f=>x=>f(f(f(x)))))("Fizz")(((f=>(x=>f(y=>x(x)(y)))(x=>f(y=>x(x)(y))))(f=>n=> (n=>n((t=>f=>t)(t=>f=>f))(t=>f=>t))(n)(()=>0)(()=>f((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(n))+1)()))(n)))))(n)))(f((n=>f=>x=>n(g=>h=>h(g(f)))((t=>f=>t)(x))(x=>x))(n))))())((m=>n=>n((m=>n=>n(n=>f=>x=>f(n(f)(x)))(m))(m))(f=>x=>x))((m=>n=>n((m=>n=>n(n=>f=>x=>f(n(f)(x)))(m))(m))(f=>x=>x))(f=>x=>f(f(f(f(f(x))))))(f=>x=>f(f(f(f(f(x)))))))((n=>f=>x=>f(n(f)(x)))(f=>x=>f(f(f(x)))))))
ワンライン（2571文字）