How can I check if a file is empty?

Question

I have thousands of text files and would like to know how to check if a particular file is empty. I am reading all the files using this line of code

Y<-grep(\         


        

Answer 1

For a functional approach, you might first write a predicate:

file.empty <- function(filenames) file.info(filenames)$size == 0

And then filter the list of files using it:

Filter(file.empty, dir())