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#' Conversion between base10 and base30
#'
#' The conversion functions from base10 to base30 and vice versa are
#' used by the [generate_uids()] functions.
#'
#' The symbols to represent the 'base 30' system are the 0-9
#' followed by the alphabet without vowels but including the y. This
#' vector is available as `base30`.
#'
#' @param x The vector to convert (numeric for `numericToBase30`,
#' character for `base30toNumeric`).
#'
#' @return The converted vector (numeric for `base30toNumeric`, character for `numericToBase30`).
#' @name base30conversion
#' @rdname base30conversion
#' @examples numericToBase30(654321);
#' base30toNumeric(numericToBase30(654321));
#' @export
numericToBase30 <- function(x) {
result <- character();
i <- 1L;
while (x > 0) {
result[i] <- base30[x %% 30L + 1L];
i <- i + 1L;
x <- x %/% 30L;
}
res <- paste(rev(result), sep="", collapse="")
return(res);
}
base30 <- c(0:9,
'b', 'c', 'd', 'f', 'g',
'h' ,'j', 'k', 'l', 'm',
'n', 'p', 'q', 'r', 's',
't', 'w', 'x', 'y', 'z');
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