class String

Public Instance Methods

title_case_line() click to toggle source

title_case_line capitalizes each 'word' in a string, except for words which already have an upper case letter somewhere in them, and except for short articles, prepositions, conjugations and abbreviations which are not the first word of the string.

# File lib/title_case.rb, line 35
def title_case_line
  art  = "(a)|(an)|(the)"
  prep = "(on)|(in)|(to)|(by)|(for)|(at)|(of)|(as)|(off)|(as)|(out)|(up)"
  part = "(if)"
  conj = "(and)|(but)|(nor)|(or)|(yet)|(so)"
  abbr = "(re)|(w)|(etc)|(v)|(vs)"
  ignore_raw = '(' + [art, prep, part, conj, abbr].join('|') + ')'
  punct_wrap = "[^[:alpha:]]*"
  ignore = Regexp.new('^' + punct_wrap + ignore_raw + punct_wrap + '$')

  title_case_words =  self.split.map.with_index do |word, index|
    (word =~ /[[:upper:][:digit:]]/) || ( index > 0 && ignore.match(word)) \
      ? word \
      : word.title_case_word
  end

  title_case_words.join(' ')
end

title_case_word() click to toggle source

title_case_word upcases the first alpha character in a string.

# File lib/title_case.rb, line 24
def title_case_word
  # the non-alpha beginning lets us capitalize "'the'" to "'The'",
  self.sub(/^[^[:alpha:]]*[[:alpha:]]/){|first| first.upcase}
end