Creating random code strings with Array#inject

inject.rb

# (to learn inject I am...)
# Using inject to create random strings

def code(size)
  chars = ("a".."z").to_a+(0..9).to_a
  Array.new(size).inject("") { |str, n| str += chars[rand(chars.size)].to_s }
end
 
50.times { |i| puts code(i) }