Look and say sequence implementation

look_and_say.rb

def look_and_say(rows: 6)
  # set first row manually
  row = '1'
  
  rows.times do
    puts row
    
    # split row to array to be able to count elements
    row_chars = row.chars
    
    # emptying string to inject count results
    row = ''
    
    # offset to which element to look at from current
    offset = 1
    row_chars.each_with_index do |item, index|
      # skip if previous element is equal to current because it should have been counted
      next if index > 0 && item == row_chars[index - 1]
      
      # by default count = 1 because element itself is consist only himself
      count = 1
      
      # increment count and offset if next element is equal to current
      while item == row_chars[index + offset] && row_chars.size > index + offset
        count += 1
        offset += 1
      end
      
      # next iteration start from looking at next element
      offset = 1
      
      # inject result of counting current item amount to row
      row << "#{count}#{item}"
    end
  end
end

look_and_say
# 1
# 11
# 21
# 1211
# 111221
# 312211

look_and_say(rows: 8)
# 1
# 11
# 21
# 1211
# 111221
# 312211
# 13112221
# 1113213211