How to list only directories (not files) in current directory in Julia [with screenshots]

Written by Administrator on Saturday May 9, 2020

To list files in current directory and exclude counting directories (sub-directories) in current folder we just use readdir() function and then we count only files.

Let's see, what we have in a directory (files and directories):

$ ls


dima@linux-zsrx:~/julia> ls
bookings        hello-world.jl
books.txt       libs
count_files.jl  list_only_files.jl

You see, that we have two directories ("libs" and "bookings") and the rest are files. Our goal is to list only those two directories (de facto: only subdirectories/sub-folders) and exclude files. Let's create a file with the name list_only_dirs.jl in order to use it in every directory in our system, and put following code into it:

files_and_dirs = readdir(pwd())  # reading files and directory

for x in files_and_dirs
        if isdir(x)            # checking, if it's directory
                println(x)      # print the name of a directory

Then let's save the file and test, if it does, what we want:

$ julia list_only_dirs.jl



As you see, we don't see files, but only directories. It means we did everything correct.

In this example we used openSUSE Leap 15.1 Linux distribution and julia version 1.0.3:

openSUSE version

installed julia version in openSUSE linux