This gist describes how you can treat a single item like an array in ruby by just prefixing it with the asterisk operator(*)

Treat single object like array in ruby.rb

class Fixnum
  def digits_count
    # a cool trick to return the base 10 logarithm of x.
    # which always defaults to the actual number of digits - 1
    Math.log10(self).to_i + 1 # here we add the missing 1.
  end
end
# a single random number
item = rand(9999999)
# just a dummy array
items = [1,2,3,4,5]

# prefixing the single Fixnum object with asterisk treats it..
#  like an array of one element which of course is 'item'
[*item].each { |i| puts i }
# just to print a nice separator that fits with the random number digit count.
puts "-" * item.digits_count
[*items].each { |i| puts i }

# the same as
Array(item).each{ |i| i }
Array(items).each{ |i| i }