Copying the contents of one directory to another

copy_folder.rb

# you want to recursively copy the contents of one folder to another
# but you don't want to actually copy the first folder into the second
#3 ways to try to copy the contents of one directory to another:

require 'pathname'
require 'fileutils'
include FileUtils

p = Pathname.new('input')
o = Pathname.new('output')

# 1) 
p.children.each do |c|        # this works
  cp_r c, o
end

# 2)
cp_r p.children, o            # this works, and is a little simpler than #1

# 3)
cp_r p, o                     # this doesn't work, 
# it copies the input directory, as well as it's contents into output
# result looks like: output/input/CONTENTS