dholstius

#' fast_POSIXct
#'
#' Quickly convert local timestamps to a POSIXct vector
#'
#' @param   x   timestamps (YYYY-mm-dd HH:MM:SS)
#' @param   tz  local timezone
#' @return      POSIXct vector
#' @export
fast_POSIXct <- function(x, tz) {
    stopifnot(is.character(x))

dholstius

#' (Left) join with a custom comparator
#'
#' @param left  data.frame
#' @param right data.frame
#' @param by    names of columns to join by
#' @param fun   custom comparator (see examples)
#'
#' @examples
#' my_df <- data.frame(cyl = c(4, 4, 6, 8), vs = c(0, 1, NA, NA), foo = c("A", "B", "C", "D"))
#' my_fun <- function (e1, e2) (e1 == e2) | is.na(e2)