Nothing
Tuple <- function(x, ...){
if(!is.data.frame(x)){
stop("Tuples should be a single row dataframe")
}
if(nrow(x) != 1){
stop("Tuples should be a single row dataframe")
}
class(x) <- "Tuple"
x
}
is.Tuple <- function(x){
ifelse( class(x) == "Tuple", TRUE, FALSE )
}
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