R/err-msg-utils.R

In tfautograph: Autograph R for 'Tensorflow'

pc_and <- function(..., sep = "") {
  x <- paste(..., sep = sep, collapse = NULL)
  lx <- length(x)
  if (lx == 0L)
    ""
  else if (lx == 1L)
    x
  else if (lx == 2L)
    paste0(x, collapse = " and ")
  else
    paste0(paste0(x[-lx], collapse = ", "), ", and ", x[lx])
}


pc_or <- function(..., sep = "") {
  x <- paste(..., sep = sep, collapse = NULL)
  lx <- length(x)
  if (lx == 0L)
    ""
  else if (lx == 1L)
    x
  else if (lx == 2L)
    paste0(x, collapse = " or ")
  else
    paste0(paste0(x[-lx], collapse = ", "), ", or ", x[lx])
}