Lorem Ipsum Generator — Ruby source

# lorem-ipsum — Ruby port: canonical Lorem Ipsum generator (sentences, paragraphs, blocks).

# The canonical word pool — identical across every port.
WORDS = 'lorem ipsum dolor sit amet consectetur adipiscing elit sed do eiusmod tempor ' \
        'incididunt ut labore et dolore magna aliqua enim ad minim veniam quis nostrud exercitation ' \
        'ullamco laboris nisi aliquip ex ea commodo consequat duis aute irure in reprehenderit ' \
        'voluptate velit esse cillum eu fugiat nulla pariatur excepteur sint occaecat cupidatat ' \
        'non proident sunt culpa qui officia deserunt mollit anim id est laborum'.split(' ').freeze

# Uniform integer in [0, max); Kernel#rand is non-crypto, matching the TS
# source's Math.random().
def rand_below(max)
  max <= 0 ? 0 : rand(max)
end

# One capitalized sentence of min_words..max_words random words.
def sentence(min_words: 8, max_words: 16)
  span = [1, max_words - min_words + 1].max
  count = min_words + rand_below(span)
  body = Array.new(count) { WORDS.sample }.join(' ')
  # Capitalize the first character only — String#capitalize would also
  # lowercase the tail. The nil-guards make a zero-word body yield '.',
  # matching the TS source's charAt(0) behaviour.
  "#{body[0].to_s.upcase}#{body[1..].to_s}."
end

# sentences default-length (8..16 word) sentences joined by spaces.
def paragraph(sentences: 5)
  Array.new(sentences) { sentence }.join(' ')
end

def lorem(paragraphs: 3, sentences_per_para: 5)
  Array.new(paragraphs) { paragraph(sentences_per_para) }.join("\n\n")
end

puts lorem