Discriminate first and last element in each?

Question

@example.each do |e|
  #do something here
end

Here I want to do something different with the first and last element in each, how should I achieve this?

Answer 1

One of the nicer approaches is:

@example.tap do |head, *body, tail|
  head.do_head_specific_task!
  tail.do_tail_specific_task!
  body.each { |segment| segment.do_body_segment_specific_task! }
end