R Under development (unstable) (2023-11-07 r85491 ucrt) -- "Unsuffered Consequences"
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> ##
> ##  p e r m s . R  Test Suite
> ##
> 
> perms <- pracma::perms
> randperm <- pracma::randperm
> 
> identical(perms(2), matrix(2, 1, 1))
[1] TRUE
> identical(perms(c(1, 2)), matrix(c(2, 1, 1, 2), 2, 2))
[1] TRUE
> identical(nrow(perms(1:6)), 720L)
[1] TRUE
> 
> all(c(1,2,3) %in% randperm(c(1,2,3)))
[1] TRUE
> 
> proc.time()
   user  system elapsed 
   0.15    0.04    0.18