Read or write files, assuming they are encoded in UTF-8. read_utf8() is
roughly readLines(encoding = 'UTF-8') (a warning will be issued if non-UTF8
lines are found), and write_utf8() calls writeLines(enc2utf8(text), useBytes = TRUE).
read_utf8(con, error = FALSE)write_utf8(text, con, ...)
append_utf8(text, con, sort = TRUE)
append_unique(text, con, sort = function(x) base::sort(unique(x)))
read_utf8() returns a character vector of the file content;
write_utf8() returns the con argument (invisibly).
A connection or a file path.
Whether to signal an error when non-UTF8 characters are detected
(if FALSE, only a warning message is issued).
A character vector (will be converted to UTF-8 via enc2utf8()).
Other arguments passed to writeLines() (except useBytes, which
is TRUE in write_utf8()).
Logical (FALSE means not to sort the content) or a
function to sort the content; TRUE is equivalent to
base::sort.
The function append_utf8() appends UTF-8 content to a file or connection
based on read_utf8() and write_utf8(), and optionally sort the content.
The function append_unique() appends unique lines to a file or connection.