Guess if a file is a text file for a vector of filenames or filepaths
Source:R/is_text_file.R
is_text_file.RdThis function will guess if a file is a text file for a vector of filenames
or filepaths and return TRUE or FALSE for each. It guesses that a file is
text if it doesn't find any nul bytes in the first 2048 bytes of the file.
This is an imperfect guess, but it is very likely that a binary/non-text file
will have a nul byte near the beginning of the file. This might guess that a
file that is not intended to be read in as text is a text file, but at least
you will likely be able to read in the file as text without error. If the
file is inaccessible, either because it is empty, you don't have permission
to read it, it's a directory, or it doesn't exist, this function will return
FALSE. If you pass anything that is not a character vector or a single
column data.frame to the filepaths argument, this function will give an
error.