Module:Sandbox/RexxS/String2

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-- Later versions available in module space as [[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 "" )
	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

return p