June 2018 Update
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5278 changed files with 84726 additions and 14379 deletions
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rand.parens <- function(n) paste(permute(c(rep('[',n),rep(']',n))),collapse="")
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rand.parens <- function(n) paste(sample(c("[","]"),2*n,replace=T),collapse="")
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as.data.frame(within(list(), {
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parens <- replicate(10, rand.parens(sample.int(10,size=1)))
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