repeated factorial, leaderboard

repeated factorial, leaderboard

Jelly:       !¡
05AB1E:      F!                                                         (swaps order)
J:           !^:                                                        (swaps order)
Actually:    `!`n
MATL:        :":p
CJam:        q~{m!}*
Pyth:        u.!GEQ
Pyth:        Mem=.!GH
Jolf:        e+*j"!Y                                                    (swaps order)
Mathematica: #!&~Nest~##&
J:           4 :'(!^:y)x'
J:           4 :0\n(!^:y)x\n)
J:           ".@($&'!'@[,":@])
UGL:         iilRc%l$d:_l*%:%rd:_o
Julia:       f(x,y)=y>0?prod(1:f(x,y-1)):x
Haskell:     f 0 y=y\nf x y=product[1..f(x-1)y]                         (swaps order)
Julia:       x->y->"$x"*repeat("|>factorial",y)                         (without evaluation)
Ruby:        ->a,b{eval'a=(1..a).inject:*;'*b}
Javascript:  f=(a,b,k=1)=>b&&(a&&f(a-1,b,k*a)||f(k,b-1))||a
Julia:       x->y->eval(parse("$x"*repeat("|>factorial",y)))
Javascript:  g=_=>_-1?_*g(_-1):1;f=a=>b=>--b?f(g(a))(b):g(a)
Python:      f=lambda a,b,k=1:b and(a and f(a-1,b,k*a)or f(k,b-1))or a