Ruby best practice : if not empty each do else in one operator

Question

1.I can\'t find an elegant way to write this code:

if array.empty?
  # process empty array
else
  array.each do |el|
    # process el
  end
end

Answer 1

An if the array is nil then we can enforce to empty array

if (array || []).each do |x|
  #...
  puts "x",x
end.empty?
  puts "empty!"
end