Ruby:
Checking if a directory exists

How to:

Ruby’s standard library provides straightforward methods to check for a directory’s existence. Here’s how you do it with pure Ruby, without needing any third-party libraries:

require 'fileutils'

# Check if a directory exists
if Dir.exist?('/path/to/directory')
  puts 'Directory exists.'
else
  puts 'Directory does not exist.'
end

Sample Output:

Directory exists.

Or:

Directory does not exist.

In addition to using Dir.exist?, you can also utilize the File.directory? method which returns true if the given path is a directory:

if File.directory?('/path/to/directory')
  puts 'Directory exists.'
else
  puts 'Directory does not exist.'
end

Both Dir.exist? and File.directory? are part of Ruby’s standard library and do not require any external gems to use, making them convenient and efficient options for directory checks.