xfun (version 0.21)

process_file: Read a text file, process the text with a function, and write the text back

Description

Read a text file with the UTF-8 encoding, apply a function to the text, and write back to the original file.

Usage

process_file(file, FUN = identity, x = read_utf8(file))

Arguments

file

Path to a text file.

FUN

A function to process the text.

x

The content of the file.

Value

If file is provided, invisible NULL (the file is updated as a side effect), otherwise the processed content (as a character vector).

Examples

# NOT RUN {
f = tempfile()
xfun::write_utf8("Hello World", f)
xfun::process_file(f, function(x) gsub("World", "woRld", x))
xfun::read_utf8(f)  # see if it has been updated
file.remove(f)
# }