unroll loop

gistfile1.rb

def sequential_search(array, solution)
  array[array.length] = solution
  index               = 0

  while true
    break if array[index    ] == solution 
    break if array[index + 1] == solution 
    break if array[index + 2] == solution 
    break if array[index + 3] == solution 
    break if array[index + 4] == solution 
    break if array[index + 5] == solution 
    break if array[index + 6] == solution 
    break if array[index + 7] == solution 

    index += 8
  end

  if index == array.length
    -1 
  else
    index
  end
end