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 

I'd like to have one loop, without writing array twice. I read this, but there is no solution good enough.

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2. I am actually in an HAML template. Same question.

- if array.empty?   %p No result - else   %ul   - array.each do |el|     %li el 

Answer 1

What about?

array.each do |x|   #...   puts "x",x end.empty? and begin   puts "empty!" end