This is a Ruby script adapted from John Gruber’s TitleCase Perl Script:

!/usr/bin/ruby

This filter changes all words to Title Caps, and attempts to be clever

about uncapitalizing small words like a/an/the in the input.

#

The list of "small words" which are not capped comes from

the New York Times Manual of Style, plus 'vs' and 'v'.

#

Ruby version by Frank Schmitt

http://frankschmitt.org/

21 May 2008

#

Adapted from perl version by John Gruber

http://daringfireball.net/

10 May 2008

#

License: http://www.opensource.org/licenses/mit-license.php

#

small_re = %w( a an and as at but by en for if in of on or the to via v[.]? vs[.]? ).join('|');

ARGF.each do |line| # split line into phrases line = line.split(/( [:.;?!][ ] | (?:[ ]|^)["”] )/x).collect do |s| # Uppercase all non-dotted (e.g. del.icio.us) words for now s.gsub(/\b([[:alpha:]][[:lower:].'’]*)\b/ex) do |w| w.match(/[[:alpha:]] [.] [[:alpha:]] /x) ? w : w.capitalize end.

    # Lowercase our list of small words:
    gsub(/\b(#{small_re})\b/i) {|w| w.downcase }.

    # If the first word in the title is a small word, then capitalize it:
    gsub(/\A([[:punct:]]*)(#{small_re})\b/io) { $1 + $2.capitalize}.

    # If the last word in the title is a small word, then capitalize it:
    gsub(/\b(#{small_re})([[:punct:]]*)\Z/io) { $1.capitalize + $2}
end.join.

# Special Cases
gsub(/ V(s?)[.] /, ' v\1. ').               # "v." and "vs.":
gsub(/(['’])S\b/, '\1s').                   # 'S (otherwise you get "the SEC'S decision")
gsub(/\b(AT&T|Q&A)\b/i) {|s| s.upcase}      # "AT&T" and "Q&A", which get tripped up by

puts line;

end

Someone could probably clean this up by going back and re-thinking the problem. The above is just a quick port of Gruber’s script.