Split up a string by words using a character limit.

string_chunk_by_words.rb

class String
  def chunk_by_words(char_count)
    words = self.split
    s1_len = 0
    word_count = 0
    i = 0
    while (i <= words.count-1)
      s1_len += words[i].length
      word_count += 1
      i+=1
      break if s1_len >= char_count
    end
    [words[0..word_count-1].join(' '), words[word_count..words.count].join(' ')]
  end
end