Elixir:
Checking if a directory exists

How to:

Elixir’s standard library offers a straightforward way to check for the existence of a directory through the File module. Here’s how you can use it:

if File.dir?("path/to/directory") do
  IO.puts "Directory exists!"
else
  IO.puts "Directory does not exist."
end

Sample output, assuming the directory does not exist:

Directory does not exist.

For more advanced filesystem interactions, including checking directory existence, you might consider using third-party libraries like FileSystem. While Elixir’s standard capabilities are sufficient for many cases, FileSystem can offer more nuanced control and feedback for complex applications. However, for the basic need of checking if a directory exists, sticking to the native File module is typically recommended since it’s readily available and doesn’t require any external dependencies.