Question

What’s the best way to determine if a character is a valid file path? So CheckFilePath( "my*file.csv") would return FALSE (on windows * is invalid character), whereas CheckFilePath( "c:\\users\\blabla\\desktop\\myfile.csv" ) would return TRUE.

Note that a file path can be valid but not exist on disk.

Answer 1

This is the code that save is using to perform that function:

 ....
 else file(file, "wb")
            on.exit(close(con))
        }
        else if (inherits(file, "connection")) 
            con <- file
        else stop("bad file argument")
 ......