Generate a never ending list of words.

word_generator.rb

# Initialize variables
alphabet  = 1
word      = 1
direction = 'down'
ignore    = false
chars     = []

# 0..20 is just a soft limit so the machine doesn't crash. Switch the hashtag
# in front of the following two lines for endless mode:

# while true        # Remove the first hashtag here
(0..20).each do |i| # Add the hashtag in this line
  # Generate char list for this step
  chars = []
  (1..alphabet).each do |char|
    chars << (64 + char).chr
  end

  # Generate word list
  word_list = chars.repeated_permutation(word).to_a.map do |word|
    puts word.join('')
  end

  # Maybe jump over the border detection
  if ignore
    # Don't jump in the next step
    ignore = false
  else
    # If we are at the left border, go down and then go right up in the next step
    if alphabet == 1
      direction = 'up'
      word     += 1

      ignore = true
      next
    # If we are at the top border, go right and then down left in the next step
    elsif word == 1
      direction = 'down'
      alphabet += 1

      ignore = true
      next
    end
  end

  # Go right up or down right in the table
  # => Calculate the next alphabet and word length
  if direction == 'down'
    word     += 1
    alphabet -= 1
  elsif direction == 'up'
    word     -= 1
    alphabet += 1
  end
end