Nothing
.quotes <- "^(`|[[]|\")(.*)(`|[]]|\")$"
is_quoted <- function(x) grepl(.quotes, x)
to_upper <- function(x) {
x <- as.character(x)
is_quoted <- is_quoted(x)
x[!is_quoted] <- toupper(x[!is_quoted])
x
}
is_try_error <- function(x) {
inherits(x, "try-error")
}
set_names <- function(x, names) {
names(x) <- names
x
}
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