Nothing
#' Pad leading zeros to character
#'
#' @param x character or object that can be coerced to such
#' @param n desired length of outcome vector
#'
#' @return Character vector of length \code{n}
pad0 <- function(x, n) {
n <- pmax(0, n - nchar(x))
paste0(
vapply(n, function(l) paste(rep("0", l), collapse = ""), character(1)),
as.character(x))
}
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