Using the Bubble sort method for an array in Ruby

Question

I'm trying to implement the Bubble sort method into an easy coding problem for Ruby, but I'm having some trouble. I understand the idea is to look at the value of the first element and compare it to the value of the second element and then swap them accordingly, but I can't seem to do it in an actual problem. Would anyone be willing to provide a brief example of how this might work in Ruby?

Answer 1

Correct implementation of the bubble sort with a while loop

def bubble_sort(list)
  return list if list.size <= 1 # already sorted
  swapped = true
  while swapped do
    swapped = false
    0.upto(list.size-2) do |i|
      if list[i] > list[i+1]
        list[i], list[i+1] = list[i+1], list[i] # swap values
        swapped = true
      end
    end    
  end

  list
end