netease.rb

# http://group.jobbole.com/22681/?utm_source=blog.jobbole.com&utm_medium=sidebar-group-topic

def test_str(str)
  str_arr = str.split ''
  if has_continuous_char(str_arr) || has_pattern(str_arr)
    'Dislikes'
  else
    'Likes'
  end
end

def has_continuous_char(a)
  a.each_index do |i|
    return true if a[i] == a[i - 1]
  end
  false
end

def has_pattern(a)
  guesses = iterator a
  guesses.any? { |g| g.length >= 4 }
end

def iterator(a, guesses = [''], old_chars = [])
  return guesses unless c = a.first

  guesses.map! do |guess|
    if can_add_to_guess?(guess, c)
      guess += c
    else
      guess
    end
  end

  old_chars.each do |old_c|
    guesses.push "#{old_c}#{c}"
  end

  iterator a.drop(1), guesses.uniq, old_chars.push(c)
end

def can_add_to_guess?(guess, c)
  l = guess.length
  l == 0 ||
  l == 1 ||
  l == 2 && c == guess[0] ||
  l == 3 && c == guess[1]
end

p test_str('ASDSALIAA')