Module:String2

local p = {}

p.upper = function(frame) local s = mw.text.trim(frame.args[1] or "") return string.upper(s) end

p.lower = function(frame) local s = mw.text.trim(frame.args[1] or "") return string.lower(s) end

p.sentence = function (frame ) local s = mw.text.trim( frame.args[1] or "" ) if string.find(s, "^%[%[^%+%]%]") then -- this is a piped wikilink, so we capitalise the text, not the pipe local b, c = string.find(s, "|%A*%a") -- find the first letter after the pipe return string.sub(s, 1, c-1) .. string.upper(string.sub(s, c, c)) .. string.sub(s, c+1) end local letterpos = string.find(s, '%a') if letterpos then local first = string.sub(s, 1, letterpos - 1) local letter = string.sub(s, letterpos, letterpos) local rest = string.sub(s, letterpos + 1) return first .. string.upper(letter) .. string.lower(rest) else return s	end end

p.title = function (frame ) -- http://grammar.yourdictionary.com/capitalization/rules-for-capitalization-in-titles.html -- recommended by The U.S. Government Printing Office Style Manual: -- "Capitalize all words in titles of publications and documents,	-- except a, an, the, at, by, for, in, of, on, to, up, and, as, but, or, and nor." local alwayslower = {['a'] = 1, ['an'] = 1, ['the'] = 1, ['and'] = 1, ['but'] = 1, ['or'] = 1, ['for'] = 1, ['nor'] = 1, ['on'] = 1, ['in'] = 1, ['at'] = 1, ['to'] = 1, ['from'] = 1, ['by'] = 1, ['of'] = 1, ['up'] = 1 } local res = '' local s = mw.text.trim( frame.args[1] or "" ) local words = mw.text.split( s, " ") for i, s in ipairs(words) do		s = string.lower( s ) if( i > 1 ) then if( alwayslower[s] ~= 1 ) then s = mw.getContentLanguage:ucfirst(s) end else s = mw.getContentLanguage:ucfirst(s) end words[i] = s	end return table.concat(words, " ") end

return p